How to get all the keys of an associative array in PHP
In this tutorial, we are going to see how to get all the keys of an associative array in PHP. You can use the PHP array_keys() function to extract all the keys from an associative array.
How to get all the keys of an associative array in PHP
<?php
$languages = array("p"=>"PHP", "j"=>"Java", "a"=>"Ada", "h"=>"HTML");
print_r(array_keys($languages));
?>
Output:
Array ( [0] => p [1] => j [2] => a [3] => h )You can also use the foreach loop to find or display all keys.
<?php
$languages = array("p"=>"PHP", "j"=>"Java", "a"=>"Ada", "h"=>"HTML");
foreach($languages as $key => $value){
echo $key . " : " . $value . "<br>";
}
?>
Output:
p : PHP j : Java a : Ada h : HTML
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