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exit (PHP 3, PHP 4, PHP 5) exit -- Output a message and terminate the current script 说明void exit ( [string status] ) void exit ( int status )
Terminates execution of the script.
参数
status
If status is a string, this function prints the
status, if set as a string just before exiting.
If status is an integer, that
value will also be used as the exit status. 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.
注意:
PHP >= 4.2.0 does NOT print the status
if it is an integer.
范例
例 1. exit() example <?php
$filename = '/path/to/data-file';
$file = fopen($filename, 'r')
or exit("unable to open file ($filename)");
?> |
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例 2. exit() status example <?php
//exit program normally
exit;
exit();
exit(0);
//exit with an error code
exit(1);
exit(0376); //octal
?> |
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注释注意: 由于这是一个语言结构而非函数，因此它无法被变量函数调用。
注意:
This language construct is equivalent to die().
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