uopz_allow_exit

(PECL uopz 5, PECL uopz 6, PECL uopz 7)

uopz_allow_exit — Allows control over disabled exit opcode

Description

uopz_allow_exit(bool $allow): void

By default uopz disables the exit opcode, so exit() calls are practically ignored. uopz_allow_exit() allows to control this behavior.

Parameters

allow: Whether to allow the execution of exit opcodes or not.

Return Values

No value is returned.

Examples

Example #1 uopz_allow_exit() example

<?php
exit(1);
echo 1;
uopz_allow_exit(true);
exit(2);
echo 2;
?>

The above example will output:

Notes

Caution

OPcache optimizes away dead code after unconditional exit.

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User Contributed Notes 1 note

down

ryan dot marquardt at gmail dot com ¶

13 days ago

PHP 8.4 changed exit and die to functions, so this call has no effect. Instead you can redefine those functions to do nothing.

<?php
function allow_exit( bool $allow ) {
  if ( PHP_VERSION_ID < 80400 ) {
    uopz_allow_exit( $allow );
  } elseif ( $allow ) {
    uopz_unset_return( 'exit' );
    uopz_unset_return( 'die' );
  } else {
    uopz_set_return('exit', static function() {});
    uopz_set_return('die', static function() {});
  }
}
?>

Test:
<?php
echo "Calling die() with allow_exit(false)\n";
allow_exit( false );
die();
echo "Calling die() with allow_exit(true)\n";
allow_exit( true );
die();
echo "Unreachable\n";
?>
Calling die() with allow_exit(false)
Calling die() with allow_exit(true)