PHP 5 >= 5.2.0, PHP 7, PHP 8
preg_last_error - Returns the error code of the last PCRE regex execution

preg_last_error( ): int

Returns the error code of the last PCRE regex execution.

preg_last_error example

('/(?:\D+|<\d+>)*[!?]/''foobar foobar foobar');

if (
preg_last_error() == PREG_BACKTRACK_LIMIT_ERROR) {
'Backtrack limit was exhausted!';


The above example will output:

Backtrack limit was exhausted!


This function has no parameters.

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 PREG_JIT_STACKLIMIT_ERROR

Related Functions

Function preg_last_error:

  • Manual

Regular Expressions (Perl-Compatible) Functions

Most used PHP functions