PHP | ReflectionClass isInstance() Function

PHP | ReflectionClass hasConstant() Function

Last Updated : 04 Dec, 2019

The ReflectionClass::hasConstant() function is an inbuilt function in PHP which is used to check the specified constant is present or not. Syntax:

bool ReflectionClass::hasConstant( string $name )

Parameters: This function accepts a single parameter $name which holds the name of the defined constant. Return Value: This function returns TRUE if the constant is define, FALSE otherwise. Below programs illustrate the ReflectionClass::hasConstant() function in PHP: Program 1:

php

<?php

// Defining a user-defined class Company
class Company {
    const c1 = 'GeeksforGeeks';
}

// Using the ReflectionClass over the
// defined user-defined class Company
$constant = new ReflectionClass("Company");

// Calling the hasConstant() function
$const = $constant->hasConstant("c1");

// Getting the value TRUE or FALSE
var_dump($const);
?>

Output:

bool(true)

Program 2:

php

<?php
 
// Defining an empty class
class Company {
}
 
// Using the ReflectionClass over the
// defined user-defined class Company
$constant = new ReflectionClass("Company");
 
// Calling the hasConstant() function and
// getting the value TRUE or FALSE
var_dump($constant->hasConstant("c1"));
?>

Output:

bool(false)

Reference: https://secure.php.net/manual/en/reflectionclass.hasconstant.php

PHP | ReflectionClass isInstance() Function

K

Kanchan_Ray

Improve

Article Tags :

Similar Reads

PHP | ReflectionClass getConstant() Function

The ReflectionClass::getConstant() function is an inbuilt function in PHP which is used to return the value of the defined constant. Syntax: mixed ReflectionClass::getConstant( string $name ) Parameters: This function accepts a parameter Name which is the name of the defined constant. Return Value:

PHP | ReflectionClass getConstants() Function

The ReflectionClass::getConstants() function is an inbuilt function in PHP which is used to return an array of the specified constant names. Syntax: array ReflectionClass::getConstants( void ) Parameters: This function does not accept any parameter. Return Value: This function returns an array of th

PHP | ReflectionClass isInstance() Function

The ReflectionClass::isInstance() function is an inbuilt function in PHP which is used to check whether the specified object is an instance of the class or not. Syntax: bool ReflectionClass::isInstance( object $object ) Parameters: This function accepts a single parameter object which is being searc

PHP | ReflectionClass isInstantiable() Function

The ReflectionClass::isInstantiable() function is an inbuilt function in PHP which is used to check the specified class is instantiable or not. Syntax: bool ReflectionClass::isInstantiable( void ) Parameters: This function does not accept any parameters. Return Value: This function returns TRUE if t

PHP | ReflectionClass isAbstract() Function

The ReflectionClass::isAbstract() function is an inbuilt function in PHP which is used to check the specified class is abstract or not. Syntax: bool ReflectionClass::isAbstract( void ) Parameters: This function does not accept any parameters. Return Value: This function returns true for the success

PHP | ReflectionClass hasMethod() Function

The ReflectionClass::hasMethod() function is an inbuilt function in PHP which is used to check the specified method is present or not.Syntax: bool ReflectionClass::hasMethod( string $name ) Parameters: This function accepts a single parameter $name which holds the name of the method which are being

PHP | ReflectionClass isCloneable() Function

The ReflectionClass::isCloneable() function is an inbuilt function in PHP which is used to check the specified class is cloneable or not. Syntax: bool ReflectionClass::isCloneable( void ) Parameters: This function does not accept any parameters. Return Value: This function returns True if class is c

PHP | ReflectionClass isFinal() Function

The ReflectionClass::isFinal() function is an inbuilt function in PHP which is used to check the specified class is final or not. Syntax: bool ReflectionClass::isFinal( void ) Parameters: This function does not accept any parameters. Return Value: This function returns true for the success or false

PHP | ReflectionClass isInternal() Function

The ReflectionClass::isInternal() function is an inbuilt function in PHP which is used to check if class is defined internally by an extension, or the core. Syntax: bool ReflectionClass::isInternal( void ) Parameters: This function does not accept any parameters. Return Value: This function returns

PHP | ReflectionClass getConstructor() Function

The ReflectionClass::getConstructor() function is an inbuilt function in PHP which is used to return the constructor of the specified class or NULL if the class is not having any constructor. Syntax: ReflectionMethod ReflectionClass::getConstructor( void ) Parameters: This function does not accept a