PHP 7.0 + can handle fatal errors without terminating PHP process. It means we can catch the fatal error using

catch

block

try {
    undefinedFunction();
} catch (Error $e) {
    echo 'Fatal error occurred: ' . $e->getMessage();
}

After running the above code on PHP 7+ the result will be:

Fatal error occurred: Call to undefined function undefinedFunction()

If we run the same code on PHP 5.6, we will get the following result:

<br />
<b>Fatal error</b>:  Call to undefined function undefinedFunction() in <b>[...][...]</b> on line <b>5</b><br />