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class_exists() function in PHP
The class_exists() function in PHP checks if the class has been defined. It returns TRUE if class is a defined class, else it returns FALSE.
Syntax
class_exists(class, autoload)
Parameters
class − Name of the class.
autoload − Whether to call __autoload or not by default
Return
The class_exists() function returns TRUE if class is a defined class, else it returns FALSE.
Example
The following is an example −
<?php if (class_exists('Demo')) { $demo = new Demo(); echo "Our class!"; } else { echo "Class does not exist"; } ?>
Output
The following is the output −
Class does not exist!
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