How to Sort a PHP Associative Array by Average Search Volume?

Sorting an Associative Array by Average Search Volume in PHP

Sorting an associative array by a specific field, such as avgSearchVolume, requires a custom sorting function. PHP provides the usort() function to perform user-defined sorting on arrays.

Sorting Function:

To sort the given array in descending order of the avgSearchVolume field, define a comparison function as follows:

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

This function subtracts the avgSearchVolume value of $a from that of $b, resulting in a positive value if $b's value is greater. This ensures that higher avgSearchVolume values will be placed earlier in the sorted array.

Sorting the Array:

Once the comparison function is defined, pass the associative array and the function name to the usort() function:

usort($array, "cmp");

After this line of code, the $array will be sorted in descending order of the avgSearchVolume field.

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