How to use the exit() function in PHP

exit() The function outputs a message and exits the current script. This function is an alias of the die() function.

Syntax:

exit    ( string $status )

exit    ( int $status )

• If $status is a string, the function will print $status before exiting .

• If $status is an int, the value will be used as the exit status code and will not be printed. Exit status codes should be in the range 0 to 254, and the exit status code 255, which is reserved by PHP, should not be used. Status code 0 is used to terminate the program successfully.

1. If the parameter is a string:

<?php

    $filename = &#39;./exit.html&#39;;
    $file = @fopen($filename, &#39;r&#39;)
    or exit("打开文件($filename)失败");
?>

Output: Open file (./exit .html) failed because the file exit.html does not exist in the current path.

2. If the parameter is empty:

<?php
$filename = &#39;./exit.html&#39;;
echo "此处使用了exit()";

$file = @fopen($filename, &#39;r&#39;)
    or exit();
?>

Output: exit() is used here

3. Only contains status code

<?php
exit(1);
exit(0376); 
?>

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