超越PHP - Exceed PHP: exit

Description

void exit ( [string status])

void exit ( int status)

注: This is not a real function, but a language construct.

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

The exit() function terminates execution of the script. It prints status 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.

例子 1. exit() example

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

例子 2. exit() status example

<?php //exit program normally exit; exit(); exit(0); //exit with an error code exit(1); exit(0376); //octal ?>

注: The die() function is an alias for exit().

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exit

devinemke at devinemke dot com
11-Jan-2002 04:38

If you are using templates with numerous includes then exit() will end you
script and your template will not complete (no </table>,
</body>, </html> etc...).  Rather than having complex nested
conditional logic within your content, just create a "footer.php"
file that closes all of your HTML and if you want to exit out of a script
just include() the footer before you exit().

for
example:

include ('header.php');
blah blah blah 
if
(!$mysql_connect) {
echo "unable to connect";
include
('footer.php');
exit;
}
blah blah blah
include ('footer.php');

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