Syntax
$tags = ["php", "web"];
$user = ["name" => "Ada"];Examples
Iterating key-value data
A small, runnable example of this syntax.
<?php
$user = ["name" => "Ada", "active" => true];
foreach ($user as $key => $value) {
echo "$key: $value\n";
}
?>Best practices
- Use associative keys consistently and check that expected external keys exist before reading them.
- Keep examples small while learning, then combine the idea with a real project.
At a glance
- Purpose
- Server-side web applications
- File extension
- .php
- Runs in
- PHP runtime on a server or CLI
- Usually used with
- HTML, databases and web servers