exit

(PHP 4, PHP 5, PHP 7, PHP 8)

exitOutput a message and terminate the current script

Descrizione

exit(string $status = ?): void
exit(int $status): void

Terminates execution of the script. Shutdown functions and object destructors will always be executed even if exit is called.

exit is a language construct and it can be called without parentheses if no status is passed.

Elenco dei parametri

status

If status is a string, this function prints the status just before exiting.

If status is an int, that value will be used as the exit status and not printed. Exit statuses should be in the range 0 to 254, the exit status 255 is reserved by PHP and shall not be used. The status 0 is used to terminate the program successfully.

Valori restituiti

Nessun valore viene restituito.

Esempi

Example #1 exit example

<?php

$filename
= '/path/to/data-file';
$file = fopen($filename, 'r')
or exit(
"unable to open file ($filename)");

?>

Example #2 exit status example

<?php

//exit program normally
exit;
exit();
exit(
0);

//exit with an error code
exit(1);
exit(
0376); //octal

?>

Example #3 Shutdown functions and destructors run regardless

<?php
class Foo
{
public function
__destruct()
{
echo
'Destruct: ' . __METHOD__ . '()' . PHP_EOL;
}
}

function
shutdown()
{
echo
'Shutdown: ' . __FUNCTION__ . '()' . PHP_EOL;
}

$foo = new Foo();
register_shutdown_function('shutdown');

exit();
echo
'This will not be output.';
?>

Il precedente esempio visualizzerà:

Shutdown: shutdown()
 Destruct: Foo::__destruct()

Note

Nota: Poiché questo è un costrutto del linguaggio e non una funzione, non può essere chiamato con le variabili funzione

Nota:

This language construct is equivalent to die().

Vedere anche: