IT. Expert System.

PHP

Output a message and terminate the current script


exit

(PHP 4, PHP 5)

exitOutput a message and terminate the current script

Description

void exit ([ string $status ] )
void exit ( int $status )

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.

Parameters

status

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

If status is an integer, 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.

Note: PHP >= 4.2.0 does NOT print the status if it is an integer.

Return Values

No value is returned.

Examples

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.';
?>

The above example will output:

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

Notes

Note: Because this is a language construct and not a function, it cannot be called using variable functions.

Note:

This language construct is equivalent to die().

See Also



Content

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary

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