array_merge(3) [php man page]

ARRAY_MERGE(3)								 1							    ARRAY_MERGE(3)

array_merge - Merge one or more arrays

SYNOPSIS

       array array_merge (array  $array1, [array  $...])

DESCRIPTION

	Merges	the  elements of one or more arrays together so that the values of one are appended to the end of the previous one. It returns the
       resulting array.

	If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the  arrays
       contain numeric keys, the later value will not overwrite the original value, but will be appended.

	Values in the input array with numeric keys will be renumbered with incrementing keys starting from zero in the result array.

PARAMETERS

	      o $array1
		- Initial array to merge.

	      o $...
		- Variable list of arrays to merge.

RETURN VALUES

	Returns the resulting array.

EXAMPLES

       Example #1

	      array_merge(3) example

	      <?php
	      $array1 = array("color" => "red", 2, 4);
	      $array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
	      $result = array_merge($array1, $array2);
	      print_r($result);
	      ?>

	      The above example will output:

	      Array
	      (
		  [color] => green
		  [0] => 2
		  [1] => 4
		  [2] => a
		  [3] => b
		  [shape] => trapezoid
		  [4] => 4
	      )

       Example #2

	      Simple array_merge(3) example

	      <?php
	      $array1 = array();
	      $array2 = array(1 => "data");
	      $result = array_merge($array1, $array2);
	      ?>

	       Don't forget that numeric keys will be renumbered!

	      Array
	      (
		  [0] => data
	      )

	       If  you	want  to  append array elements from the second array to the first array while not overwriting the elements from the first
	      array and not re-indexing, use the + array union operator:

	      <?php
	      $array1 = array(0 => 'zero_a', 2 => 'two_a', 3 => 'three_a');
	      $array2 = array(1 => 'one_b', 3 => 'three_b', 4 => 'four_b');
	      $result = $array1 + $array2;
	      var_dump($result);
	      ?>

	       The keys from the first array will be preserved. If an array key exists in both arrays, then the element from the first array  will
	      be used and the matching key's element from the second array will be ignored.

	      array(5) {
		[0]=>
		string(6) "zero_a"
		[2]=>
		string(5) "two_a"
		[3]=>
		string(7) "three_a"
		[1]=>
		string(5) "one_b"
		[4]=>
		string(6) "four_b"
	      }

       Example #3

	      array_merge(3) with non-array types

	      <?php
	      $beginning = 'foo';
	      $end = array(1 => 'bar');
	      $result = array_merge((array)$beginning, (array)$end);
	      print_r($result);
	      ?>

	      The above example will output:

	      Array
		  (
		      [0] => foo
		      [1] => bar
		  )

SEE ALSO

       array_merge_recursive(3), array_replace(3), array_combine(3), array operators.

PHP Documentation Group 													    ARRAY_MERGE(3)

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ARRAY_DIFF_ASSOC(3)							 1						       ARRAY_DIFF_ASSOC(3)

array_diff_assoc - Computes the difference of arrays with additional index check

SYNOPSIS

       array array_diff_assoc (array  $array1, array  $array2, [array  $...])

DESCRIPTION

	Compares $array1 against $array2 and returns the difference. Unlike array_diff(3) the array keys are also used in the comparison.

PARAMETERS

	      o $array1
		- The array to compare from

	      o $array2
		- An array to compare against

	      o $...
		- More arrays to compare against

RETURN VALUES

	Returns an array containing all the values from $array1 that are not present in any of the other arrays.

EXAMPLES

       Example #1

	      array_diff_assoc(3) example

	       In  this  example  you  see  the  "a" => "green" pair is present in both arrays and thus it is not in the output from the function.
	      Unlike this, the pair 0 => "red" is in the output because in the second argument "red" has key which is 1.

	      <?php
	      $array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
	      $array2 = array("a" => "green", "yellow", "red");
	      $result = array_diff_assoc($array1, $array2);
	      print_r($result);
	      ?>

	      The above example will output:

	      Array
	      (
		  [b] => brown
		  [c] => blue
		  [0] => red
	      )

       Example #2

	      array_diff_assoc(3) example

	       Two values from key => value pairs are considered equal only if (string) $elem1 === (string) $elem2 . In other words a strict check
	      takes place so the string representations must be the same.

	      <?php
	      $array1 = array(0, 1, 2);
	      $array2 = array("00", "01", "2");
	      $result = array_diff_assoc($array1, $array2);
	      print_r($result);
	      ?>

	      The above example will output:

	      Array
	      (
		  [0] => 0
		  [1] => 1
		  )

NOTES

       Note

	       This  function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example,
	      array_diff_assoc($array1[0], $array2[0]);.

       Note

	       Ensure you pass arguments in the correct order when comparing similar arrays with more keys. The new array should be the  first	in
	      the list.

SEE ALSO

       array_diff(3), array_diff_uassoc(3), array_udiff_assoc(3), array_udiff_uassoc(3), array_intersect(3), array_intersect_assoc(3).

PHP Documentation Group 												       ARRAY_DIFF_ASSOC(3)

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array_merge(3) [php man page]

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