如何将字符串转换为整数，但将“foo”与“0”区分开来？

Question

I need to convert strings to intiger but with distinguish "foo" from "0", because intval() php function converts non numeric values to 0.

With inputs:

$a = "10"
$b = "foo"
$c = "0"
$d = "10.5"

I expecting after convertion:

$a == 10
$b == "foo" // or false or whatever that is not an integer
$c == 0
$d == 10.5

Answer 1

You could consider using conditional operator, code would like somehow as below:

$foo = is_numeric($bar) ? (float) $bar : $bar;

There's no reason to overthink that solution, this should be enough.