Haifa linux club:PHP lecture
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array functions

(partial list)
count - Count elements in a variable
array_pop - Pop the element off the end of array
array_push - Push one or more elements onto the end of array
array_reverse - Return an array with elements in reverse order
array_shift - Shift an element off the beginning of array
array_unshift - Prepend one or more elements to the beginning of array
array_sum - Calculate the sum of values in an array.
array_unique - Removes duplicate values from an array
array_values - Return all the values of an array
in_array - Return TRUE if a value exists in an array
array_search - Searches the array for a given value and returns the corresponding key if successful
sizeof - Get the number of elements in variable
sort - Sort an array
uksort - Sort an array by keys using a user-defined comparison function
usort - Sort an array by values using a user-defined comparison function


<?

function cmp ($a, $b) {   

    if ($a == $b) return 0;

    return ($a < $b) ? -1 : 1;

}



$a = array (3, 2, 5, 6, 1);



usort ($a, "cmp");

?>

array_flip - Flip all the values of an array


<?

$trans = array ("a" => 1, "b" => 1, "c" => 2);

$trans = array_flip ($trans);

// now $trans is : array(1 => "b", 2 => "c");

?>

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