Get keys from an associative array in PHP

Today we write a short article on how to get keys from an associative array in PHP.

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Way to get keys from an associative array

1. Using array_keys() function
2. Using foreach loop

1. Using array_keys() function

The `array_keys()` function returns the new array with keys. Let's see one example.

<?php
$student_marks = array(
	"John"=>"89",
	"Michael"=>"79",
	"Christopher"=>"90",
	"Alexander"=> "81"
);

$new_array = array_keys($student_marks);
print_r($new_array);
?>

// Output:

Array
(
    [0] => John
    [1] => Michael
    [2] => Christopher
    [3] => Alexander
)

2. Using foreach loop

We can also get all the keys from the array using the foreach loop.

<?php
$student_marks = array(
	"John"=>"89",
	"Michael"=>"79",
	"Christopher"=>"90",
	"Alexander"=> "81"
);

$new_userArray = array();
foreach($student_marks as $key=>$value){
	echo $key . " : " . $value . "<br>";
}
?>

// Output:

John : 89
Michael : 79
Christopher : 90
Alexander : 81

That’s it for today.
Thank you for reading. Happy Coding!