PHP | SplObjectStorage valid() Function

The SplObjectStorage::valid() function is an inbuilt function in PHP which is used to check the current storage entry is valid or not.

Syntax:

bool SplObjectStorage::valid()

Parameters: This function does not accept any parameter.



Return Value: This function returns true if the iterator entry is valid, false otherwise.

Below programs illustrate the SplObjectStorage::valid() function in PHP:

Program 1:

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<?php
  
// Create an empty SplObjectStorage
$str = new SplObjectStorage();
  
$obj = new StdClass;
$obj2 = new StdClass;
$obj3 = new StdClass;
  
// Use attach() function to
// add object
$str->attach($obj, "GFG");
  
// Use rewind() function to rewind the 
// iterator to the first storage element
$str->rewind();
  
// Use valid() function to check current
// iterator is valid entry or not
print($str->valid());
  
?>

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Output:


1





Program 2:











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<?php 


  


// Create an empty SplObjectStorage 


$gfg = new SplObjectStorage(); 


  


$obj1 = new StdClass; 


$obj2 = new StdClass; 


$obj3 = new StdClass; 


  


$gfg[$obj1] = "GFG"; 


$gfg[$obj2] = "GeeksClasses"; 


$gfg[$obj3] = "SUDO"; 


  


  


// Use rewind function 


$gfg->rewind(); 


  


while($gfg->valid()) { 


  


    var_dump($gfg->getInfo()); 


      


    // Moving to next element 


    $gfg->next(); 


} 


?> 



















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Output:


string(3) "GFG"
string(12) "GeeksClasses"
string(4) "SUDO"





Reference: https://www.php.net/manual/en/splobjectstorage.valid.php



          
          
          
          

            

    

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    Article Tags : 
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Web Technologies

           	
Practice Tags : 
PHP

        

         

         
 
         
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