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PHP Casting

Cast to Float

float(5)
float(5.34)
float(25)
float(0)
float(0)
float(1)
float(0)

Note that when casting a string that starts with a number, the (float) function uses that number. If it does not start with a number, the (float) function convert strings into the number 0.

<?php
// data types to be cast to floats
$a = 5;       // Integer
$b = 5.34;    // Float
$c = "25 kilometers"; // String
$d = "kilometers 25"; // String
$e = "hello"; // String
$f = true;    // Boolean
$g = NULL;    // NULL

// casting to floats
$a = (float) $a;
$b = (float) $b;
$c = (float) $c;
$d = (float) $d;
$e = (float) $e;
$f = (float) $f;
$g = (float) $g;

// To verify the type of any object in PHP, use the var_dump() function:
var_dump($a);
var_dump($b);
var_dump($c);
var_dump($d);
var_dump($e);
var_dump($f);
var_dump($g);
?>