PHP でキーと値のペアに基づいて多次元配列要素を削除する方法

Delete Elements from Multidimensional Arrays Based on Value

In PHP, deleting elements from a multidimensional array requires a structured approach to identify and remove specific sub-arrays based on a designated key-value pair.

To achieve this, utilize a custom function:

<code class="php">function removeElementWithValue($array, $key, $value) {
    foreach ($array as $subKey => $subArray) {
        if ($subArray[$key] == $value) {
            unset($array[$subKey]);
        }
    }
    return $array;
}</code>

This function takes three parameters: the original array, the key corresponding to the desired value, and the value to match. It iterates through each sub-array, comparing the specified key's value to the target value. If a match is found, it removes the entire sub-array using the unset() function.

For example, to delete all sub-arrays where the "year" key has the value 2011:

<code class="php">$array = removeElementWithValue($array, "year", 2011);</code>

This will effectively filter out the sub-arrays that meet the criteria, resulting in a modified array with those sub-arrays removed.

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