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EDIT :: Escaper.php

<?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\Yaml; /** * Escaper encapsulates escaping rules for single and double-quoted * YAML strings. * * @author Matthew Lewinski <matthew@lewinski.org> */ class Escaper { // Characters that would cause a dumped string to require double quoting. const REGEX_CHARACTER_TO_ESCAPE = "[\\x00-\\x1f]|\xc2\x85|\xc2\xa0|\xe2\x80\xa8|\xe2\x80\xa9"; // Mapping arrays for escaping a double quoted string. The backslash is // first to ensure proper escaping because str_replace operates iteratively // on the input arrays. This ordering of the characters avoids the use of strtr, // which performs more slowly. private static $escapees = array('\\\\', '\\"', '"', "\x00", "\x01", "\x02", "\x03", "\x04", "\x05", "\x06", "\x07", "\x08", "\x09", "\x0a", "\x0b", "\x0c", "\x0d", "\x0e", "\x0f", "\x10", "\x11", "\x12", "\x13", "\x14", "\x15", "\x16", "\x17", "\x18", "\x19", "\x1a", "\x1b", "\x1c", "\x1d", "\x1e", "\x1f", "\xc2\x85", "\xc2\xa0", "\xe2\x80\xa8", "\xe2\x80\xa9"); private static $escaped = array('\\"', '\\\\', '\\"', "\\0", "\\x01", "\\x02", "\\x03", "\\x04", "\\x05", "\\x06", "\\a", "\\b", "\\t", "\\n", "\\v", "\\f", "\\r", "\\x0e", "\\x0f", "\\x10", "\\x11", "\\x12", "\\x13", "\\x14", "\\x15", "\\x16", "\\x17", "\\x18", "\\x19", "\\x1a", "\\e", "\\x1c", "\\x1d", "\\x1e", "\\x1f", "\\N", "\\_", "\\L", "\\P"); /** * Determines if a PHP value would require double quoting in YAML. * * @param string $value A PHP value * * @return Boolean True if the value would require double quotes. */ public static function requiresDoubleQuoting($value) { return preg_match('/'.self::REGEX_CHARACTER_TO_ESCAPE.'/u', $value); } /** * Escapes and surrounds a PHP value with double quotes. * * @param string $value A PHP value * * @return string The quoted, escaped string */ public static function escapeWithDoubleQuotes($value) { return sprintf('"%s"', str_replace(self::$escapees, self::$escaped, $value)); } /** * Determines if a PHP value would require single quoting in YAML. * * @param string $value A PHP value * * @return Boolean True if the value would require single quotes. */ public static function requiresSingleQuoting($value) { return preg_match('/[ \s \' " \: \{ \} \[ \] , & \* \# \?] | \A[ \- ? | < > = ! % @ ` ]/x', $value); } /** * Escapes and surrounds a PHP value with single quotes. * * @param string $value A PHP value * * @return string The quoted, escaped string */ public static function escapeWithSingleQuotes($value) { return sprintf("'%s'", str_replace('\'', '\'\'', $value)); } }

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