PHP escaped regular expression characters: preg_quote_php tutorial

PHP escaped regular expression character: Preg_quote

Preg_quote-escaping regular expression characters

String Preg_quote (String $str [, String $delimiter = NULL])

Preg_quote () requires the parameter str and adds a backslash to the character in each of the regular expression syntax. This is typically used when you have some run-time strings that need to be matched as regular expressions.

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

Parameters

Str

Input string

Delimiter

If an optional parameter delimiter is specified, it is also escaped. This is typically used to escape the delimiter used by the Pcre function. /is the most common delimiter.

return value

Returns the escaped string.

Preg_quote () example

$keywords = ' $ g3/400 for a ';
$keywords = Preg_quote ($keywords, '/');
Echo $keywords; Returns \$40 for a g3\/400
?>

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