CODEWITHSUNDEEP
phparrayssorting
svk
svk

Reputation: 4553

How to sort an array by some specific key?

I have an array look like below.

$array[0]['keyword']  = 'cricket ';
$array[0]['noofhits'] = '26';

$array[1]['keyword']  = 'food  ';
$array[1]['noofhits'] = '17';

$array[2]['keyword']  = 'mypax';
$array[2]['noofhits'] = '22';

$array[3]['keyword']  = 'next';
$array[3]['noofhits'] = '22';

$array[4]['keyword']  = 'nextbutton';
$array[4]['noofhits'] = '22';

$array[5]['keyword']  = 'picture';
$array[5]['noofhits'] = '18';

I want to sort the array using the noofhits. How can I do? Advance Thanks for your advice.

Soory for the previous one.Thanks for your answers.

Upvotes: 0

Views: 1640

Answers (1)

Gumbo
Gumbo

Reputation: 655785

Use usort with a custom comparison function:

function cmp($a, $b) {
    return $a['noofhits'] - $b['noofhits'];
}
usort($array, 'cmp');

usort expects the comparison function to return three different value:

  • 0 if a and b are equal
  • integer less than 0 if a precedes b
  • integer greater than 0 if b precedes a

So we can simply subtract the value of b from a. If a’s value is greater than b’s value, the subtraction yields a positive integer; if a’s value is equal to b’s value, it yields 0; and if a’s value is less than b’s value, it yields a negative value.

Upvotes: 9

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