PHP Array Operators

Array operators

Array operators

Example	name	Results
$a + $b	Joint	The Union of $a and $b.
$a = = $b	Equal	TRUE if $a and $b have the same key/value pair.
$a = = = $b	Congruent	True if $a and $b have the same key/value pairs and the order and type are the same.
$a! = $b	Range	TRUE if the $a is not equal to $b.
$a <> $b	Range	TRUE if the $a is not equal to $b.
$a!== $b	Not congruent	TRUE if the $a is not all equal to $b.

The + operator attaches the array element on the right (those elements that have the same key value as the left array element) to the left array, but the duplicate key value is not overwritten.

<?php$a = Array ("A" = "Apple", "b" = "banana"); $b = Array ("A" = "pear", "b" = "Strawberry", "C" and "=" Cherry "); $c = $a + $b;  Union of $a and $becho "union of $a and $b:  "; Var_dump ($c); $c = $b + $a;//Union of $b and $aecho "Union of $b and $a:  

Once executed, this script will display:

U

Union of $a and $b: Array (3) {["a"]=> string (5) "Apple" ["B"]=> string (6) "Banana" ["C"]=> string (6) "Cherry"} Union of $b and $a: Array (3) {["a"]=> string (4) "Pear" ["B"]=> string (Ten) "Strawberry" ["C"]=> string (6) "Cherry " }

The cells in the array are compared when they have the same key name and value.

Example #1 Compare arrays

<?php$a = Array ("Apple", "banana"), $b = Array (1 = "banana", "0" = "apple"), var_dump ($a = = $b); BOOL (true) var_dump ($a = = = $b); BOOL (FALSE)?>

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PHP Array Operators