Question:

How can I check to see if a function, method or class exists before I call it?

Answer:

Use the function_exists function. This is useful if the function you're using is only available from a later version of php or part of an extension package that may not have been included in the php install.

<?php
array $newArray;
if(function_exists(array_splice))
{
$newArray = array_splice($myArray, 5);
}
else
{
//need to find another way to do array_splice...
}
?>

Additional Notes

Also check out method_exists and class_exists

PHP Reference Manual

array_splice - Chops up an array...

class_exists - Determine if a class exists

function_exists - Determines if a function exists

method_exists - Determines if a method exists

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