php array splice



when trying to splice an associative array into another, array_splice is missing two key ingredients: a string key for identifying the offset the ability to preserve keys in the replacement array. this is primarily useful when you want to replace an item in an array with another item, but want to tain the ordering of the array  definition and usage. the array_splice() function removes selected elements from an array and replaces it with new elements. the function also returns an array with the removed elements. tip: if the function does not remove any elements (length=), the replaced array will be inserted from the position of the start parameter  parameter, description. array, required. specifies an array. start, required. numeric value. specifies where the function will start the slice. = the first element. if this value is set to a negative number, the function will start slicing that far from the last element. means start at the second last element of the array.

php array splice

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php function array splice a simple and short php tutorial and complete reference manual for all builtin php functions. this tutorial is designed for beginners to advanced developers. you will learn php builtin function, predefined variables examples, object oriented php, numbers, scalars, arrays, hash file i/o, if,  also if you want to remove a single element from the array its more efficient and cleaner to use unset as: unset($cart[]); array_splice returns the "removed/replaced" elements, which you're then assigning to overwrite the correctly spliced $cart $discard php.net/manual/en/function.unset.php. array_splice() modifies it's first argument by reference. the empty array is returns would contain the elements removed in the operation, if any were removed. since you didn't remove any, it is empty. you original variable $array has been modified as expected. $array = array('first', 'second', 'third'); 

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foreach ($_session['cart'] as $eachitem) { magic happens here. if($eachitem["product_id"] == $productid && $eachitem["size"] == $productid ){ array_splice ($_session['cart'], $i, , array (array ("product_id" => $productid, "size" => $size, "quantity" => $eachitem['quantity'] ))); $wasfound = true; break; } }. if you want  this is correct. the return array will contain removed elements, i.e. ( "red", "green" ) . the original array will be modified to contain the elements which were not removed, i.e. ( "blue", "yellow" ) . you may find this a little more intuitive. it only requires one function call to array_splice : $original = array( 'a', 'b', 'c', 'd', 'e' ); $inserted = array( 'x' ); not necessarily an array array_splice( $original, , , $inserted ); splice in at position $original is now a b c x d e. array splice: $a = array_slice($input, $id); print_r($a); array ( [] => c [] => d [] => e ). array slice: array_splice($input, $id); print_r($input); array ( [] => a ). merging the splice and the slice will give you an array that is the same as the input array but without the specific item. you probably can do this 

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