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PHP

Attila Balog
Attila Balog
5,217 Points
Posted by Attila Balog
Attila Balog
5,217 Points

I don't really understand the modified foreach loop. What does return this code: foreach($catalog as $id => $item) ???

I don't really understand the modified foreach loop. What does return this code: foreach($catalog as $id => $item) ??? Why did she put an arrow just like when you add new information about a particular item in an associative array. What is the function of that arrow?

3 Answers

Ben Schroeder
Ben Schroeder
22,818 Points
Ben Schroeder
Ben Schroeder
22,818 Points

You use that syntax when you want to iterate through all items in an array, getting both the key and the value to use in the loop, instead of just the value.

See the PHP docs: http://php.net/manual/en/control-structures.foreach.php

Algirdas Lalys
Algirdas Lalys
9,389 Points
Algirdas Lalys
Algirdas Lalys
9,389 Points

Hi Attila, for example we have simple associative array.

$catalog = array(
    "title" => "A Design Patterns: Elements of Reusable Object-Oriented Software",
    "img" => "img/media/design_patterns.jpg",
        "genre" => "Tech",
);

If we use foreach without "=>" we can access only array value. For example:

foreach($catalog as $value) {
  echo " VALUE = " . $value . "\n";
}

But if we use "=>" we can additionally access, key of the array.

foreach($catalog as $key => $value) {
  echo "KEY = " . $key . " VALUE = " . $value . "\n";
}
Attila Balog
Attila Balog
5,217 Points
Attila Balog
Attila Balog
5,217 Points

So, than the $id variable isn't referring to the index position. Am i right? It refers to the "key" and the $item to the "value".