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PHP | ReflectionParameter __toString() Function

Last Updated : 23 Dec, 2019
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The ReflectionParameter::__toString() function is an inbuilt function in PHP which is used to return the string form of the specified parameter. Syntax:
string ReflectionParameter::__toString ( void )
Parameters: This function does not accept any parameters. Return Value: This function returns the string form of the specified parameter. Below programs illustrate the ReflectionParameter::__toString() function in PHP: Program 1: php
<?php
 
// Initializing a user-defined class Company1
class Company1
{
    public function GFG( $Parameter_1){}
}
  
// Initializing a subclass Company2
class Company2 extends Company1
{
}
  
// Using the ReflectionParameter over the above class
$A = new ReflectionParameter(['Company2', 'GFG'], 0); 
  
// Calling the __toString() function
$B = $A->__toString();
  
// Getting the string form of the 
// specified parameter.
var_dump($B);
?>
Output:
string(40) "Parameter #0 [ <required> $Parameter_1 ]"
Program 2: php
<?php
  
// Initializing some user-defined classes
class Department1
{
    function HR( $Full_Name){}
}
class Department2
{
    function Coding( $Parameter2, $Par3 = 'Parameter_3'){}
}
class Department3
{
    function Marketing( &$Parameter4, ...$Parameter5){}
}
  
// Using the ReflectionParameter over the above classes
$A = new ReflectionParameter(['Department1', 'HR'], 0);
$B = new ReflectionParameter(['Department2', 'Coding'], 1);
$C = new ReflectionParameter(['Department3', 'Marketing'], 1);
  
// Calling the __toString() function and 
// getting the string form of the 
// specified parameter.
var_dump($A->__toString());
var_dump($B->__toString());
var_dump($C->__toString());
?>
Output:
string(38) "Parameter #0 [ <required> $Full_Name ]"
string(49) "Parameter #1 [ <optional> $Par3 = 'Parameter_3' ]"
string(42) "Parameter #1 [ <optional> ...$Parameter5 ]"
Reference: https://www.php.net/manual/en/reflectionparameter.tostring.php

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