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Php preg quote () function

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(PHP 3>= 3.0.9, PHP 4 , PHP 5)

preg_quote -- Quote regular expression characters


string preg_quote ( string str [, string delimiter] )

preg_quote() takes str and puts a backslash in front of every character that is part of the regular expression syntax. This is useful if you have a run-time string that you need to match in some text and the string may contain special regex characters.

If the optional delimiter is specified, it will also be escaped. This is useful for escaping the delimiter that is required by the PCRE functions. The / is the most commonly used delimiter.

The special regular expression characters are: . \ + * ? [ ^ ] $ ( ) { } = ! < > | :

Example 1. preg_quote() example

= '$40 for a g3/400';
$keywords = preg_quote($keywords, '/');
$keywords; // returns \$40 for a g3\/400

Example 2. Italicizing a word within some text

// In this example, preg_quote($word) is used to keep the
// asterisks from having special meaning to the regular
// expression.

$textbody = "This book is *very* difficult to find.";
$word = "*very*";
$textbody = preg_replace ("/" . preg_quote($word) . "/",
"<i>" . $word . "</i>",

Note: This function is binary-safe.

Php preg quote Function syntax tag

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Php preg quote syntax tutorial

php tutorial guide and code design are for easy learning and programming. The code practice section provided at the top is for practising of this syntax. Use the code section up to practice your php programming online. Learning php is very easy, all you need is to use the examples on this site and practice them to perfect your skills.

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