Php/docs/function.preg-last-error

• PHP Manual
• PCRE Functions
• Returns the error code of the last PCRE regex execution

preg_last_error

(PHP 5 >= 5.2.0, PHP 7)

preg_last_error — Returns the error code of the last PCRE regex execution

Description

preg_last_error ( ) : int

Returns the error code of the last PCRE regex execution.

Example #1 preg_last_error() example

<?phppreg_match('/(?:\D+|<\d+>)*[!?]/', 'foobar foobar foobar');if (preg_last_error() == PREG_BACKTRACK_LIMIT_ERROR) {    echo 'Backtrack limit was exhausted!';}?>

The above example will output:

Backtrack limit was exhausted!

Return Values

Returns one of the following constants (explained on their own page):

• PREG_NO_ERROR
• PREG_INTERNAL_ERROR
• PREG_BACKTRACK_LIMIT_ERROR (see also pcre.backtrack_limit)
• PREG_RECURSION_LIMIT_ERROR (see also pcre.recursion_limit)
• PREG_BAD_UTF8_ERROR
• PREG_BAD_UTF8_OFFSET_ERROR (since PHP 5.3.0)
• PREG_JIT_STACKLIMIT_ERROR (since PHP 7.0.0)

See Also

• preg_last_error_msg() - Returns the error message of the last PCRE regex execution