Can you trigger a specific exit status on a php fatal error?

Question

I've tried the following:

<?php
function shutdown_find_exit()
{
    exit(50);
}
register_shutdown_function('shutdown_find_exit');

trigger_error("Fatal error", E_USER_ERROR);

?>

But that still exists with an error code of 255.

I'm trying to have an error code of 50 returned.

I'm checking it with the following bash script:

php tester.php
status=$?
echo Exit Code: ${status}

Updated code based on the accepted answer for anyone interested:

<?php
function shutdown_find_exit()
{
    exit('50');
}
register_shutdown_function('shutdown_find_exit');

trigger_error("Fatal error", E_USER_ERROR);
?>

and the bash script

output="$(php tester.php)"
status=$?
echo Exit Code: ${status}
if [[ $output == *"50"* ]]
then
  echo "Got 50";
fi

Calling the shutdown functions is just the first of a dozen things PHP does on script termination/exit. Which is why the shutdown callbacks can't override the exit code anymore I'd guess. (Btw, 70 would be a better result code, EX_SOFTWARE.) — mario
– mario, Commented May 14, 2015 at 15:23

daxeh · Accepted Answer · 2015-05-14 15:28:59Z

1

TL;DR: use a string, instead of an int.

php exit( 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.

Execute php script in bash, assign output to variable.

variable = $(/path/to/php -f $HOME/path/to/my.php)

For example:

# just executing php, but capturing output then, prints it to console
status = $(/usr/bin/php -f $HOME/path/to/tester.php)
echo Exit Code: ${status}

Hope this helps.

edited May 14, 2015 at 15:28

answered May 14, 2015 at 15:17

daxeh

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4 Comments

Rob Over a year ago

If I use a string, that string is displayed, but the exit code captured by the bash script is still 255.

daxeh Over a year ago

@Rob: i've updated with an example maybe useful to you.

Rob Over a year ago

I appreciate the help, I updated the original question showing the code I used.

daxeh Over a year ago

Nice! Thanks for sharing.. pay it forward :)

Jahid · Accepted Answer · 2015-05-14 15:28:05Z

1

See if this does what you want to do:

trigger_error("Fatal error", shutdown_find_exit());

answered May 14, 2015 at 15:28

Jahid

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1 Comment

Rob Over a year ago

This actually did work, but I was just using the trigger_error as an easy way to trigger the error to make the example shorter. I apperciate the effort, but I'm going to mark Adrian's because that answer worked better for me.

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