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Most common PHP array functions.

Most common PHP array functions.
 
PHP provides a wide range of array functions to manipulate and work with arrays. Here are some of the most commonly used array functions in PHP:

1. count: Returns the number of elements in an array.
$count = count($array);

2. array_merge: Combines multiple arrays into a single array,not for multidimensional array.
$result = array_merge($array1, $array2, ...);

$array1 = array('a', 'b', 'c');
$array2 = array(1 => 'd');

$resultArray = array_merge($array1, $array2);
print_r($resultArray);

Array ( [0] => a [1] => b [2] => c [3] => d )

3. array_push: Pushes one or more elements onto the end of an array.
array_push($array, $element1, $element2, ...);

  $multidimensionalArray = array(
    'colors' => array('red', 'green'),
    'fruits' => array('apple')
);

// Using array_push to add a new color to the 'colors' sub-array
array_push($multidimensionalArray['colors'], 'blue');

// Using array_push to add a new fruit to the 'fruits' sub-array
array_push($multidimensionalArray['fruits'], 'orange');

print_r($multidimensionalArray);

Array ( [colors] => Array ( [0] => red [1] => green [2] => blue ) [fruits] => Array ( [0] => apple [1] => orange ) )
 

4. array_pop: Removes and returns the last element from an array.
$lastElement = array_pop($array);

5. array_shift: Removes and returns the first element from an array.
$firstElement = array_shift($array);

$array = array('apple', 'banana');

$firstElement = array_shift($array);

echo "Removed Element: " . $firstElement . "\n";
print_r($array);

Removed Element: apple 
Array ( [0] => banana )

6. array_unshift: Adds one or more elements to the beginning of an array.
array_unshift($array, $element1, $element2, ...);

7. array_slice: Extracts a slice of an array.
$subset = array_slice($array, $start, $length);

8. array_splice: Removes a portion of the array and returns it.
$removed = array_splice($array, $start, $length);

$ms = array(
    'colors' => array('red', 'greenRemove', 'blue'),
);

// Remove 'green' from the 'colors' sub-array
array_splice($ms['colors'], 1, 1);
print_r($ms);
echo "<br />";
// Add 'purple' at index 1 in the 'colors' sub-array
array_splice($ms['colors'], 1, 1 , 'purple');

print_r($ms);

echo "<br />";
// Add 'purple' at index 1 in the 'colors' sub-array
array_splice($ms['colors'], 1 , 0  , 'ORANGE');

print_r($ms);

Array ( [colors] => Array ( [0] => red [1] => blue ) )
Array ( [colors] => Array ( [0] => red [1] => purple ) )
Array ( [colors] => Array ( [0] => red [1] => ORANGE [2] => purple ) )

9. array_key_exists: Checks if a key exists in an array.
if (array_key_exists($key, $array)) {
    // Key exists
}

10. in_array: Checks if a value exists in an array.
if (in_array($value, $array)) {
    // Value exists
}

11. array_search: Searches for a value in an array and returns its key.
$key = array_search($value, $array);

12. array_filter: Filters elements of an array using a callback function.
$filteredArray = array_filter($array, function($element) {
    return /* some condition */;
});

13. array_map: Applies a callback function to each element of an array.
$resultArray = array_map(function($element) {
    return /* some transformation */;
}, $array);

14. array_reduce: Reduces an array to a single value using a callback function.
$result = array_reduce($array, function($carry, $item) {
    return /* some reduction logic */;
});

These are just a few examples of the many array functions available in PHP. The PHP documentation is an excellent resource for exploring all available array functions and their use cases: PHP Array Functions.

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