foreach

[Mememe]

I can't seem to get a grasp of foreach. Can someone explain it more, and show in an example please?Thanks.

[Synook]

Foreach loops through each element in an array, and each iteration stores the current element to a variable. So, say we had an array of trangle numbers up to 6, the following code would loop through the array and ech time echo the element the foreach loop is examining

$triNums = array(1, 3, 6, 10, 15, 21);foreach ($triNums as triNum) {echo "$triNum, ";}

This will echo "1, 3, 6, 10, 15, 21".

[Mememe]

Foreach loops through each element in an array, and each iteration stores the current element to a variable. So, say we had an array of trangle numbers up to 6, the following code would loop through the array and ech time echo the element the foreach loop is examining

$triNums = array(1, 3, 6, 10, 15, 21);foreach ($triNums as triNum) {echo "$triNum, ";}

This will echo "1, 3, 6, 10, 15, 21".

I kind of get the idea, though I'm confused on the "as triNum" part.

[Synook]

That means that each element is stored to the $triNum variable as it comes up - I made a typo, it should be as $triNum not as triNum !

[justsomeguy]

You can also use foreach to get both the index and the value of each element. Run this code and see what happens:

<?php$test_array = array(  'name' => 'Steve',  'city' => 'Phoenix',  'age' => 28);foreach ($test_array as $key => $value){  echo "key: {$key}; value: {$value}<br>";}?>

More information here:http://www.php.net/manual/en/control-structures.foreach.php

[Mememe]

You can also use foreach to get both the index and the value of each element. Run this code and see what happens:

<?php$test_array = array(  'name' => 'Steve',  'city' => 'Phoenix',  'age' => 28);foreach ($test_array as $key => $value){  echo "key: {$key}; value: {$value}<br>";}?>

More information here:http://www.php.net/manual/en/control-structures.foreach.php

I kind of understand now. Does $key have to be key, or I can use any name for it with the $ first right?

[Synook]

I can use any name for it with the $ first right?

Right

[boen_robot]

I can use any name for it with the $ first right?

And the same goes for $value.

[Mememe]

Okay, I understand now. Thanks. -Mememe