mirror of
https://github.com/OpenXE-org/OpenXE.git
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408 lines
11 KiB
PHP
408 lines
11 KiB
PHP
<?php
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namespace Xentral\Components\Util;
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use Exception;
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use Xentral\Components\Util\Exception\InsecureRandomStringException;
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use Xentral\Components\Util\Exception\InvalidArgumentException;
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use Xentral\Components\Util\Exception\StringUtilException;
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final class StringUtil
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{
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/** @var array $translate */
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private static $transliteration = [
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'/m\x{00B2}/u' => 'qm',
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'/m\x{00B3}/u' => 'm3',
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'/ä/' => 'ae',
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'/ö/' => 'oe',
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'/ü/' => 'ue',
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'/Ä/' => 'Ae',
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'/Ö/' => 'Oe',
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'/Ü/' => 'Ue',
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'/\x{00DF}/u' => 'ss', //ß
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'/\x{20AC}/u' => 'EURO', //€
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'/\x{0026}/u' => 'und', //&
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];
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/**
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* Returns true if string starts with needle.
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*
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* @example startsWith('Apple', 'A') -> true
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*
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* @param string $haystack
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* @param string $needle
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*
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* @return bool
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*/
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public static function startsWith($haystack, $needle)
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{
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self::ensureString($haystack);
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self::ensureString($needle);
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return $needle === '' || strpos($haystack, $needle) === 0;
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}
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/**
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* Returns true if string ends with needle.
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*
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* @example endsWith('Apple', 'e') -> true
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*
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* @param string $haystack
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* @param string $needle
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*
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* @return bool
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*/
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public static function endsWith($haystack, $needle)
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{
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self::ensureString($haystack);
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self::ensureString($needle);
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return $needle === substr($haystack, strlen($haystack) - strlen($needle), strlen($needle));
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}
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/**
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* Returns true if needle appears anywhere in string.
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*
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* @example contains('Apple', 'pp') -> true
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*
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* @param string $haystack
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* @param string $needle
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*
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* @return bool
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*/
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public static function contains($haystack, $needle)
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{
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self::ensureString($haystack);
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self::ensureString($needle);
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return $needle === '' || strpos($haystack, $needle) !== false;
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}
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/**
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* Pads a string up to a specific length.
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*
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* @example padLeft('a', 4, '-') -> '---a'
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* @example padLeft('a', 4, '-+') -> '-+-a'
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*
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* @param string $string
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* @param int $length
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* @param string $pad
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*
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* @return string
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*/
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public static function padLeft($string, $length, $pad = ' ')
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{
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self::ensureString($string);
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self::ensureInteger($length);
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self::ensureString($pad);
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return self::generatePadding($length - mb_strlen($string), $pad) . $string;
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}
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/**
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* Pads a string up to a specific length.
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*
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* @example padRight('a', 4, '-') -> 'a---'
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* @example padRight('a', 4, '-+') -> 'a-+-'
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*
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* @param string $string
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* @param int $length
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* @param string $pad
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*
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* @return string
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*/
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public static function padRight($string, $length, $pad = ' ')
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{
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self::ensureString($string);
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self::ensureInteger($length);
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self::ensureString($pad);
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return $string . self::generatePadding($length - mb_strlen($string), $pad);
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}
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/**
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* Generates a filesystem-friendly (win, mac, linux) file name from a given string
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*
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* @param string $value
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*
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* @return string file name
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*/
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public static function toFilename($value)
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{
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self::ensureString($value);
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$sanitize = [
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'/\s+/' => '_', //space
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'/:\\\/' => '-', //drive name
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'/\\\\\\\/' => '-', //unc path
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'/[\\/\\\<>:|]/' => '-', //seperators and reserved
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'/"/' => '\'',
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'/[\*\?&]+/' => '', //other special chars
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'/[\x{0000}-\x{001F}]/u' => '',
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'/[\x{0080}-\x{FFFF}]/u' => '', //only ascii
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];
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$filename = preg_replace(array_keys(self::$transliteration), array_values(self::$transliteration), $value);
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$filename = preg_replace(array_keys($sanitize), array_values($sanitize), $filename);
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$filename = trim($filename, '.');
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if ($filename === '') {
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throw new StringUtilException(
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sprintf('The specified string "%s" cannot be converted to a valid file name', $value)
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);
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}
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return $filename;
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}
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/** Deletes all non-ASCII non-printable characters from a string
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*
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* Only characters between 32 to 127 (inclusive) remain.
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*
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* @param string $value
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*
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* @return string empty if whole string was non-ASCII
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*/
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public static function toAscii($value)
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{
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self::ensureString($value);
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$value = preg_replace(['/[\x{0000}-\x{001F}]/u', '/[\x{0080}-\x{FFFF}]/u'], ['', ''], $value);
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return $value;
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}
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/**
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* Transforms a String to Title case.
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*
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* Use delimiter='' to only capitalize the first character.
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*
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* @example "foo Bar BaZ" => "Foo Bar Baz"
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*
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* @param string $value
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* @param string $delimiters all characters that seperate words
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*
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* @return string
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*/
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public static function toTitleCase($value, $delimiters = '\s\v')
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{
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self::ensureString($value);
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self::ensureString($delimiters);
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$inWords = [$value];
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$outWords = [];
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if ($delimiters !== '') {
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$regex = sprintf('/[%s]/', $delimiters);
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$inWords = preg_split($regex, $value);
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}
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foreach ($inWords as $word) {
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if ($word !== '') {
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$outWords[] = mb_strtoupper(mb_substr($word, 0, 1))
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. mb_strtolower(mb_substr($word, 1, mb_strlen($word)));
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}
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}
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return implode(' ', $outWords);
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}
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/**
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* Format a nubmer of Bytes to KB, MB etc.
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*
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* @example formatBytes(1024, ' ') -> '1,0 KB'
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*
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* @param integer $bytes
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* @param string $separator
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*
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* @return string
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*/
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public static function formatBytes($bytes, $separator = '')
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{
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self::ensureInteger($bytes);
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$bytes = (int)$bytes;
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if ($bytes <= 0) {
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return sprintf('0%sBytes', $separator);
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}
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$units = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
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$exponent = (int)floor(log($bytes) / log(1024));
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if ($exponent > count($units) - 1) {
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$exponent = count($units) - 1;
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}
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$size = $bytes / pow(1024, $exponent);
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return sprintf('%s%s%s',
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number_format($size, 1, ',', '.'),
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$separator,
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$units[$exponent]
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);
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}
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/**
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* Parse PHP byte size Values to number of bytes.
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*
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* Shorthand Format is used in php_ini (e.g. post_max_size).
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*
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* @example parsePhpShorthandByte('1M') -> 1048576
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*
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* @param string $phpSize php shorthand byte format
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*
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* @return int
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*/
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public static function parsePhpByteSize($phpSize)
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{
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self::ensureString($phpSize);
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preg_match('/^(\d+)([kKmMgG]?)$/', $phpSize, $matches);
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if (empty($matches)) {
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throw new InvalidArgumentException(sprintf('"%s" is not a PHP size format.', $phpSize));
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}
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$sizes = ['' => 0, 'K' => 1, 'M' => 2, 'G' => 3];
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$number = (int)$matches[1];
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$unit = strtoupper($matches[2]);
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$exponent = $sizes[$unit];
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$bytes = $number * pow(1024, $exponent);
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return (int)$bytes;
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}
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/**
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* Generates a random String with specified length
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*
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* @param int $length
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* @param bool $secure true=create cryptographically secure string
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*
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* @throws InsecureRandomStringException
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*
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* @return string
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*/
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public static function random($length, $secure = false)
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{
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$random = self::randomByOpenSsl($length, $secure);
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if ($random === false) {
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$random = self::randomByRandomBytes($length);
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}
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if ($random !== false) {
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return $random;
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}
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if ($random === false && $secure === true) {
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throw new InsecureRandomStringException('Could not generate cryptographically secure random string.');
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}
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return self::randomByMd5($length);
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}
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/**
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* @param int $length
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* @param bool $secure
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*
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* @return string|false
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*/
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private static function randomByOpenSsl($length, $secure = false)
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{
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if (function_exists('openssl_random_pseudo_bytes')) {
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$bytes = openssl_random_pseudo_bytes(ceil($length / 2), $cryptoStrong);
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if ($bytes === false || ($secure === true && $cryptoStrong === false)) {
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return false;
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}
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return substr(bin2hex($bytes), 0, $length);
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}
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return false;
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}
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/**
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* random_bytes steht erst ab PHP7 zur Verfügung
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*
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* @param int $length
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*
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* @return string|false
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*/
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private static function randomByRandomBytes($length)
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{
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$random = false;
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if (function_exists('random_bytes')) {
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try {
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$bytes = random_bytes(ceil($length / 2));
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$random = substr(bin2hex($bytes), 0, $length);
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} catch (Exception $e) {
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}
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}
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return $random;
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}
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/**
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* @param int $length
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*
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* @return string|false
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*/
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private static function randomByMd5($length)
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{
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$random = '';
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for ($i = 0; $i * 32 <= $length; $i++) {
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$val = mt_rand();
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$random .= md5((string)$val);
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}
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$random = substr($random, 0, $length);
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return $random;
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}
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/**
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* @param int $lengthDelta
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* @param string $sequence
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*
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* @return string
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*/
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private static function generatePadding($lengthDelta, $sequence)
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{
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if ($sequence === '' || $lengthDelta < 1) {
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return '';
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}
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$padding = '';
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for ($i = 0; $i < $lengthDelta; $i++) {
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$delta = $lengthDelta - mb_strlen($padding);
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$subSequence = mb_substr($sequence, 0, $delta);
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$padding .= $subSequence;
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}
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return $padding;
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}
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/**
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* @param mixed $value
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*
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* @throws InvalidArgumentException
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*
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* @return void
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*/
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private static function ensureString($value)
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{
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$type = gettype($value);
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if ($type !== 'string') {
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throw new InvalidArgumentException(sprintf('Wrong type "%s". Only "string" is allowed.', $type));
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}
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}
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/**
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* @param mixed $value
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*
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* @throws InvalidArgumentException
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*
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* @return void
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*/
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private static function ensureInteger($value)
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{
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$type = gettype($value);
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if ($type !== 'integer') {
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throw new InvalidArgumentException(sprintf('Wrong type "%s". Only "integer" allowed.', $type));
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}
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}
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}
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