54 lines
1.3 KiB
PHP
54 lines
1.3 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Form\Util;
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/**
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* @author Issei Murasawa <issei.m7@gmail.com>
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* @author Bernhard Schussek <bschussek@gmail.com>
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*/
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class StringUtil
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{
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/**
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* This class should not be instantiated.
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*/
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private function __construct()
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{
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}
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/**
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* Returns the trimmed data.
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*/
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public static function trim(string $string): string
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{
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if (null !== $result = @preg_replace('/^[\pZ\p{Cc}\p{Cf}]+|[\pZ\p{Cc}\p{Cf}]+$/u', '', $string)) {
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return $result;
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}
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return trim($string);
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}
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/**
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* Converts a fully-qualified class name to a block prefix.
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*
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* @param string $fqcn The fully-qualified class name
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*/
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public static function fqcnToBlockPrefix(string $fqcn): ?string
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{
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// Non-greedy ("+?") to match "type" suffix, if present
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if (preg_match('~([^\\\\]+?)(type)?$~i', $fqcn, $matches)) {
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return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], $matches[1]));
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}
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return null;
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}
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}
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