phpにおけるintval()の使用例

<?php
header("Content-type:text/html;charset=utf-8");
$str = '123.456abc';
$int = intval($str);
echo 'The type of the variable $int is: '.gettype($int).'
';
var_dump($int);
? >

<?php 
echo "<br/>Value forced conversion: "; 
$string="2a"; 
$string1=intval($string); 
echo 'The value of $string1:'. $string1.'Value of $string2:';//single quotes will not output the variable, it will be output as is 
$string2=(int)($string); 
echo $string2 
? >