How Can I Create a PHP Function to Filter a Two-Dimensional Array Based on Value?

Creating a Function for Value-Based Filtering of Two-Dimensional Arrays

Filtering specific data from multi-dimensional arrays is a common task in programming. This task can be accomplished using various techniques, including PHP's array_filter function.

Function Creation

To create a function that filters a two-dimensional array by value, follow these steps:

1. Define the function with the input array as a parameter.
2. Utilize array_filter with an anonymous or callback function as the second parameter.
3. Within the callback function, use conditional logic to specify the filtering criteria.

Example Implementation

Consider the following array:

$arr = [
    [
        'interval' => '2014-10-26',
        'leads' => 0,
        'name' => 'CarEnquiry',
        'status' => 'NEW',
        'appointment' => 0
    ],
    [
        'interval' => '2014-10-26',
        'leads' => 0,
        'name' => 'CarEnquiry',
        'status' => 'CALL1',
        'appointment' => 0
    ],
    [
        'interval' => '2014-10-26',
        'leads' => 0,
        'name' => 'Finance',
        'status' => 'CALL2',
        'appointment' => 0
    ],
    [
        'interval' => '2014-10-26',
        'leads' => 0,
        'name' => 'Partex',
        'status' => 'CALL3',
        'appointment' => 0
    ]
];

To filter this array for values containing 'CarEnquiry' in the 'name' key:

function filterArrayByName($arr) {
    return array_filter($arr, function($var) {
        return $var['name'] == 'CarEnquiry';
    });
}

Customizable Filtering

To make the search value interchangeable, modify the callback function as follows:

function filterArrayByName($arr, $filterBy) {
    return array_filter($arr, function($var) use ($filterBy) {
        return $var['name'] == $filterBy;
    });
}

Now you can use the function to filter the array by any desired value in the 'name' key.

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