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vendor/symfony/form/Util/StringUtil.php

@@ -0,0 +1,57 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form\Util;
+
+/**
+ * @author Issei Murasawa <issei.m7@gmail.com>
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class StringUtil
+{
+    /**
+     * This class should not be instantiated.
+     */
+    private function __construct()
+    {
+    }
+
+    /**
+     * Returns the trimmed data.
+     *
+     * @return string
+     */
+    public static function trim(string $string)
+    {
+        if (null !== $result = @preg_replace('/^[\pZ\p{Cc}\p{Cf}]+|[\pZ\p{Cc}\p{Cf}]+$/u', '', $string)) {
+            return $result;
+        }
+
+        return trim($string);
+    }
+
+    /**
+     * Converts a fully-qualified class name to a block prefix.
+     *
+     * @param string $fqcn The fully-qualified class name
+     *
+     * @return string|null
+     */
+    public static function fqcnToBlockPrefix(string $fqcn)
+    {
+        // Non-greedy ("+?") to match "type" suffix, if present
+        if (preg_match('~([^\\\\]+?)(type)?$~i', $fqcn, $matches)) {
+            return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], $matches[1]));
+        }
+
+        return null;
+    }
+}