What is the best way to sort a multidimensional array in PHP based on a specific key while ignoring rows with a certain value?

When sorting a multidimensional array in PHP based on a specific key while ignoring rows with a certain value, you can use a custom sorting function with `usort()`. In this function, you can check for the specific value and return 0 to keep those rows in their original order. This way, you can sort the array based on the desired key while excluding rows with the specified value. 

<?php
// Sample multidimensional array
$array = [
    ['name' => 'John', 'age' => 30],
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 35],
    ['name' => 'Eve', 'age' => 30],
];

// Sort the array based on the 'age' key while ignoring rows with age 30
usort($array, function($a, $b) {
    if ($a['age'] == 30) return 0;
    if ($b['age'] == 30) return 1;
    return ($a['age'] < $b['age']) ? -1 : 1;
});

// Output the sorted array
print_r($array);
?>

Keywords

PHP multidimensional array sorting specific key ignore rows

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