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@ 2014-10-08T20:50:34Z

<?php

echo "Should pass" . PHP_EOL;

var_dump(to_int("0"));
var_dump(to_int(0));
var_dump(to_int(0.0));
var_dump(to_int("0.0"));

var_dump(to_int("10"));
var_dump(to_int(10));
var_dump(to_int(10.0));
var_dump(to_int("10.0"));
var_dump(to_int("10."));

echo "Should fail" . PHP_EOL;

var_dump(to_int(1.5));
var_dump(to_int("1.5"));
var_dump(to_int("75e-5"));
var_dump(to_int("31e+7"));

var_dump(to_int("10abc"));
var_dump(to_int("abc10"));

var_dump(to_int(INF));
var_dump(to_int(-INF));
var_dump(to_int(NAN));
var_dump(to_int(PHP_INT_MAX * 2));

var_dump(to_int(null));
var_dump(to_int(true));
var_dump(to_int(false));
var_dump(to_int(new stdClass()));
var_dump(to_int(fopen("data:text/html,foobar", "r")));
var_dump(to_int([]));

/**
 * Returns the value as an int, or false if it cannot be safely cast
 * @param mixed $val
 * @return int
 */
function to_int($val)
{
    switch (gettype($val)) {
        case "integer":
            return $val;
        case "double":
            if ($val === (float) (int) $val) {
                return (int) $val;
            } else {
                return false;
            }
        case "string":
            $val   = trim($val, " \t\n\r\v\f"); // trim whitespace
            $float = filter_var($val, FILTER_VALIDATE_FLOAT);
            return ($float !== false && (int) $val == $float) ? (int) $val : false;
        default:
            return false;
    }
}

Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Should pass int(0) int(0) int(0) int(0) int(10) int(10) int(10) int(10) int(10) Should fail bool(false) bool(false) bool(false) int(310000000) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false)
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33: Should pass int(0) int(0) int(0) int(0) int(10) int(10) int(10) int(10) int(10) Should fail bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[', expecting ')' in /in/r4Tai on line 36
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[', expecting ')' in /in/r4Tai on line 36
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/r4Tai on line 36
Process exited with code 255.

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