What are best practices for filtering data based on the initial letter in PHP?

When filtering data based on the initial letter in PHP, one best practice is to use a loop to iterate through the data and check each element against the desired initial letter. This can be done using functions like substr() to extract the first letter of each element. Another approach is to use array_filter() with a custom callback function to filter the data based on the initial letter. 

// Example code snippet for filtering data based on the initial letter 'A'

$data = ['Apple', 'Banana', 'Apricot', 'Orange', 'Avocado'];

// Using a loop to filter data based on initial letter 'A'
$filteredData = [];
foreach ($data as $item) {
    if (strtoupper(substr($item, 0, 1)) === 'A') {
        $filteredData[] = $item;
    }
}

print_r($filteredData);

// Using array_filter() with a custom callback function
$filteredData = array_filter($data, function($item) {
    return strtoupper(substr($item, 0, 1)) === 'A';
});

print_r($filteredData);

Keywords

filtering data initial letter PHP functions

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