++ Introduction to PHP Arrays ++

Let's say that you want to store numerous values within one variable. It may sound complex for some of you, but to those of us that use arrays daily, they are a God send. They help us to unclutter and organize our code and speed up development.

How to create an array:

$cars = array(1 => "Chevy", 2=> "Honda", 3=> "Mitsubishi");

PHP:

Now you can use this array.

$cars = array(1 => "Chevy", 2=> "Honda", 3=> "Mitsubishi");
if ($_POST['favorite'] == 2) {
     $favorite_car = $cars[2];
     echo 'Your favorite make of car is '.$favorite_car;
}

PHP:

This will print:

*Note: Do not use quotes in the array when using the numeric key. $cars['2'] is bad. However, you can use $cars['Honda'].

 

Is there more to come? like is_array? array_pop? in_array? and more?

 

is_array - Whether the specified variable is currently an array.
in_array($needle, $haystack, $strict) - Whether the string $needle exists as one of the values of $haystack, if $strict is set to true, then it will only match if they are identical (===, of the same type.) Returns true if it exists (and if same type if $strict), else false.
array_pop - array_pop() pops and returns the last value of the array , shortening the array by one element. If array is empty (or is not an array), NULL will be returned.

Bueno?

 

I already know those, but many find it handy to view them in examples

like

<?php

$arr = array(1,2,3,4,5);
$noArr = "";

echo (is_array($arr)) ? '$arr is an array' : '$arr is NO array';
echo (is_array($noArr)) ? '$noArr is an array' : '$noArr is NO array';
?>

PHP:

in_array:

<?php
$arr = array(1 => "key1", 2 => "Key 2", 3 => "Key 3");

echo (in_array("Key 1", $arr)) ? 'Found' : 'Not found';
echo (in_array("Key 0", $arr)) ? 'Found' : 'Not found';
?>

PHP:

etc etc

 

That's what PHP.net is for though...

:\

 

Exactly what I was about to say.

I bet these tutorials are from php.net anyways.

You really don't need anything besides a portable webserver and php.net to learn.