PHP array functions

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    2024-01-11T18:05:19+00:00

    PHP provides a wide range of functions to manipulate arrays, which are crucial in many programming scenarios. Here's a detailed overview of some commonly used PHP array functions, including code examples:

    1. array_merge(): This function merges one or more arrays into one array.

      $array1 = ['a', 'b', 'c'];
      $array2 = ['d', 'e', 'f'];
      $result = array_merge($array1, $array2);
      // Result: ['a', 'b', 'c', 'd', 'e', 'f']
      
    2. array_diff(): Computes the difference of arrays.

      $array1 = ['a', 'b', 'c'];
      $array2 = ['b', 'c', 'd'];
      $result = array_diff($array1, $array2);
      // Result: ['a']
      
    3. array_filter(): Filters elements of an array using a callback function.

      $array = [1, 2, 3, 4, 5];
      $result = array_filter($array, function($value) { return $value > 3; });
      // Result: [4, 5]
      
    4. array_map(): Applies the callback to the elements of the given arrays.

      $array = [1, 2, 3, 4, 5];
      $result = array_map(function($value) { return $value * 2; }, $array);
      // Result: [2, 4, 6, 8, 10]
      
    5. array_push(): Adds one or more elements to the end of an array.

      $array = ['a', 'b'];
      array_push($array, 'c', 'd');
      // Array now is ['a', 'b', 'c', 'd']
      
    6. array_pop(): Pops and returns the last value of the array, shortening the array by one element.

      $array = ['a', 'b', 'c'];
      $popped = array_pop($array);
      // $popped is 'c', $array is now ['a', 'b']
      
    7. sort(): Sorts an array.

      $array = [3, 1, 4, 2];
      sort($array);
      // Array is now [1, 2, 3, 4]
      
    8. array_key_exists(): Checks if a specified key exists in an array.

      $array = ['name' => 'John', 'age' => 25];
      $exists = array_key_exists('name', $array);
      // $exists is true
      
    9. array_keys(): Returns all the keys of an array.

      $array = ['name' => 'John', 'age' => 25];
      $keys = array_keys($array);
      // $keys is ['name', 'age']
      
    10. array_values(): Returns all the values of an array.

      $array = ['name' => 'John', 'age' => 25];
      $values = array_values($array);
      // $values is ['John', 25]
      

    Remember that PHP offers many more array functions, and these are just a few examples to showcase the diversity and utility of array manipulations in PHP.

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