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preg_last_error

Returns the error code of the last PCRE regex execution (PHP 5 >= 5.2.0)
int preg_last_error ( )

Returns the error code of the last PCRE regex execution.

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