I have the following array items:
[{
first_name: 'Rebecca'
}, {
first_name: 'amy'
}, {
first_name: 'Amy'
}, {
first_name: 'stacy'
}]
I want the array to be sorted alphabetically according to the first_name property. In a collision where the first_name properties are the same (ie. amy vs Amy), I want the value with the capital letter to come first.
In the above array, the sorted values should be:
[{
first_name: 'Amy'
}, {
first_name: 'amy'
}, {
first_name: 'Rebecca'
}, {
first_name: 'stacy'
}]
This is the current custom usort() I am using:
usort($users, function($a, $b){
$first_name_compare = strcasecmp($a['first_name'], $b['first_name']);
return $first_name_compare;
});
strcasecmp() is supposedly case-insensitive, but I've noticed it to be inconsistent. In the above array example, strcasecmp() will sometimes return amy before Amy and vice versa.
What's a drop in for strcasecmp() in this use case?
When strcasecmp() returns 0, you should fall back on strcmp().
usort($users, function($a, $b){
$first_name_compare = strcasecmp($a['first_name'], $b['first_name']);
if ($first_name_compare == 0) {
$first_name_compare = strcmp($a['first_name'], $b['first_name']);
}
return $first_name_compare;
});