Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

array(3) [php man page]

ARRAY(3)								 1								  ARRAY(3)

array - Create an array

SYNOPSIS
array array ([mixed $...]) DESCRIPTION
Creates an array. Read the section on the array type for more information on what an array is. PARAMETERS
o $... - Syntax "index => values", separated by commas, define index and values. index may be of type string or integer. When index is omitted, an integer index is automatically generated, starting at 0. If index is an integer, next generated index will be the big- gest integer index + 1. Note that when two identical index are defined, the last overwrite the first. Having a trailing comma after the last defined array entry, while unusual, is a valid syntax. RETURN VALUES
Returns an array of the parameters. The parameters can be given an index with the => operator. Read the section on the array type for more information on what an array is. EXAMPLES
The following example demonstrates how to create a two-dimensional array, how to specify keys for associative arrays, and how to skip-and- continue numeric indices in normal arrays. Example #1 array(3) example <?php $fruits = array ( "fruits" => array("a" => "orange", "b" => "banana", "c" => "apple"), "numbers" => array(1, 2, 3, 4, 5, 6), "holes" => array("first", 5 => "second", "third") ); ?> Example #2 Automatic index with array(3) <?php $array = array(1, 1, 1, 1, 1, 8 => 1, 4 => 1, 19, 3 => 13); print_r($array); ?> The above example will output: Array ( [0] => 1 [1] => 1 [2] => 1 [3] => 13 [4] => 1 [8] => 1 [9] => 19 ) Note that index '3' is defined twice, and keep its final value of 13. Index 4 is defined after index 8, and next generated index (value 19) is 9, since biggest index was 8. This example creates a 1-based array. Example #3 1-based index with array(3) <?php $firstquarter = array(1 => 'January', 'February', 'March'); print_r($firstquarter); ?> The above example will output: Array ( [1] => January [2] => February [3] => March ) As in Perl, you can access a value from the array inside double quotes. However, with PHP you'll need to enclose your array between curly braces. Example #4 Accessing an array inside double quotes <?php $foo = array('bar' => 'baz'); echo "Hello {$foo['bar']}!"; // Hello baz! ?> NOTES
Note array(3) is a language construct used to represent literal arrays, and not a regular function. SEE ALSO
array_pad(3), list(3), count(3), range(3), foreach, The array type. PHP Documentation Group ARRAY(3)

Check Out this Related Man Page

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)
Man Page