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
The array_keys() function returns the new array with keys. Let’s see one example.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | <?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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | <?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!
