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Online Web Code Test | Write and Run

PuStudy.Com Start write and Run your Web Code Online Work, PuStudy.Com Provide Online Web Editor, Every Language Code Work in this Editor, Editor Work Like as - Html, Php, Css, Bootstrap, Asp, jQuery Etc.

<?php
$array = array(0 => 100, "color" => "red");
print_r(array_keys($array));

$array = array("blue", "red", "green", "blue", "blue");
print_r(array_keys($array, "blue"));

$array = array("color" => array("blue", "red", "green"),
               "size"  => array("small", "medium", "large"));
print_r(array_keys($array));
?>