3v4l.org

run code in 300+ PHP versions simultaneously

@ 2014-08-01T21:47:37Z

<?php

function do_split($name) {
    return preg_split('/([A-Z]{2,}|([A-Z][^A-Z]*))/', $name, null, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
}

function convert_case($name) {
    return implode(
        '_',
        array_map(
            'strtolower',
            do_split($name)
        )
    );
}

function convert_case2($name) {
    $output = '';
    foreach ($name as $char) {
        print_r("{$char} " . json_encode(ctype_upper($char)));
    }
    return strtolower($output);
}

convert_case2('FooBARbar');

$samples = array(
    'FooBar',
    'FooBAR',
    'FOObar',
    'foo_bar',
    'FOO_bar',
    'foo_BAR',
    'foo_Bar',
    'Foo_bar',
);


/*
print_r(array_map(function ($name) {
    return array(
        'name' => $name,
        'split' => do_split($name),
        'converted' => convert_case($name),
    );
}, $samples));
*/

Output for git.master, git.master_jit, rfc.property-hooks: Warning: foreach() argument must be of type array|object, string given in /in/P1G20 on line 19

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

preferences:dark modelive preview

34.83 ms | 401 KiB | 8 Q