array_unique(3) [php man page]

ARRAY_UNIQUE(3) 							 1							   ARRAY_UNIQUE(3)

array_unique - Removes duplicate values from an array

SYNOPSIS

       array array_unique (array  $array, [int	$sort_flags = SORT_STRING])

DESCRIPTION

	Takes an input $array and returns a new array without duplicate values.

	Note  that  keys  are preserved. array_unique(3) sorts the values treated as string at first, then will keep the first key encountered for
       every value, and ignore all following keys. It does not mean that the key of the first related value from the unsorted $array will be kept.

       Note

	       Two elements are considered equal if and only if (string) $elem1 === (string) $elem2 i.e. when the  string  representation  is  the
	      same, the first element will be used.

PARAMETERS

	      o $array
		- The input array.

	      o $sort_flags
		- The optional second parameter $sort_flags may be used to modify the sorting behavior using these values:  Sorting type flags:

		     o SORT_REGULAR - compare items normally (don't change types)

		     o SORT_NUMERIC - compare items numerically

		     o SORT_STRING - compare items as strings

		     o SORT_LOCALE_STRING - compare items as strings, based on the current locale.

RETURN VALUES

	Returns the filtered array.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       |5.2.10	|						    |
       |	|						    |
       |	|  Changed the default value of $sort_flags back to |
       |	| SORT_STRING.					    |
       |	|						    |
       | 5.2.9	|						    |
       |	|						    |
       |	|  Added the  optional	$sort_flags  defaulting  to |
       |	| SORT_REGULAR.  Prior to 5.2.9, this function used |
       |	| to sort the array with SORT_STRING internally.    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      array_unique(3) example

	      <?php
	      $input = array("a" => "green", "red", "b" => "green", "blue", "red");
	      $result = array_unique($input);
	      print_r($result);
	      ?>

	      The above example will output:

	      Array
	      (
		  [a] => green
		  [0] => red
		  [1] => blue
	      )

       Example #2

	      array_unique(3) and types

	      <?php
	      $input = array(4, "4", "3", 4, 3, "3");
	      $result = array_unique($input);
	      var_dump($result);
	      ?>

	      The above example will output:

	      array(2) {
		[0] => int(4)
		[2] => string(1) "3"
	      }

SEE ALSO

       array_count_values(3).

NOTES

       Note

	       Note that array_unique(3) is not intended to work on multi dimensional arrays.

PHP Documentation Group 													   ARRAY_UNIQUE(3)

Check Out this Related Man Page

COLLATOR_ASORT(3)							 1							 COLLATOR_ASORT(3)

Collator::asort - Sort array maintaining index association

       Object oriented style

SYNOPSIS

       public bool Collator::asort (array  &$arr, [int	$sort_flag])

DESCRIPTION

	Procedural style
       bool collator_asort (Collator  $coll, array  &$arr, [int  $sort_flag])

	This  function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is
       used mainly when sorting associative arrays where the actual element order is significant. Array elements will have sort order according to
       current locale rules.

	Equivalent to standard PHP asort(3).

PARAMETERS

	      o $coll
		-Collator object.

	      o $arr
		-Array of strings to sort.

	      o $sort_flag
		- Optional sorting type, one of the following:

		     o Collator::SORT_REGULAR - compare items normally (don't change types)

		     o Collator::SORT_NUMERIC - compare items numerically

		     o Collator::SORT_STRING - compare items as strings

	       Default $sort_flag value is Collator::SORT_REGULAR. It is also used if an invalid $sort_flag value has been specified.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      collator_asort(3)example

	      <?php
	      $coll = collator_create( 'en_US' );
	      $arr = array(
		   'a' => '100',
		   'b' => '50',
		   'c' => '7'
	      );
	      collator_asort( $coll, $arr, Collator::SORT_NUMERIC );
	      var_export( $arr );

	      collator_asort( $coll, $arr, Collator::SORT_STRING );
	      var_export( $arr );
	      ?>

	      The above example will output:

	      array (
		'c' => '7',
		'b' => '50',
		'a' => '100',
	      )array (
		'a' => '100',
		'b' => '50',
		'c' => '7',
	      )

SEE ALSO

       Collator constants, collator_sort(3), collator_sort_with_sort_keys(3).

PHP Documentation Group 													 COLLATOR_ASORT(3)

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array_unique(3) [php man page]

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