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PHP ReflectionClass isUserDefined () function

Syntax:
bool ReflectionClass::isUserDefined()
Parameters:this the function takes no parameters.Return value:this function returns TRUE if the custom class is available, otherwise FALSE.The following programs illustrate the function ReflectionClass::isUserDefined()in PHP:
Program 1:  
// Define a custom Company class Class Company { public function GeeksforGeeks() { } }  
// Using ReflectionClass over
// specific class $obj = new ReflectionClass ( ’Company’ );  
// Calling the isUserDefined() function $A = $obj -> isUserDefined();  
// Get true or false var_dump ( $A ); ?>
Output:
bool (true)
Program 2:  
// Using the inner class ’ ReflectionClass ’ $obj = new ReflectionClass ( ’ReflectionClass’ );  
// Calling the isUserDefined() function $A = $obj -> isUserDefined();  
// Get true or false var_dump ( $A ); ?>
Output:
bool (false)
Link: https://www.php.net/manual/en/reflectionclass.isuserdefined.php

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