PHP Integer
Checking for an Integer
Checking for an integer is done using the
function is_int:
<?php
$num = 1234;
$res = is_int($num);
?>
It returns either true or false.
An integer can be a string. The is_int function
will output false in this case. For such
a check, use is_numeric:
<?php
var_dump(is_numeric('1234')); // will output true
?>
Converting to an Integer
Like this:
<?php
$str = '1234';
$num = (int) $str;
?>
Or like this:
<?php
$str = '1234';
$num = (integer) $str;
?>
Or like this:
<?php
$str = '1234';
$num = intval($str);
?>
