PHPでstrval()関数を使用するにはどうすればよいですか?

strval( $variable )

<?php
  
$var_name = 32.360;
  
// prints the value of above variable 
// as a string
echo strval ( $var_name );
  
?>

32.36

<?php
  
class lsbin
{
     public function __toString()
     {   
         // returns the class name 
         return __CLASS__ ;
     }
}
  
// prints the name of above class as
// a string
echo strval ( new lsbin);
  
?>

lsbin

<?php
// Program to illustrate the strval() function
// when an array is passed as parameter
  
// Input array
$arr = array (1, 2, 3, 4, 5);
  
// This will print only the type of value
// being converted i.e. &#39;Array&#39;
echo strval ( $arr );
  
?>