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PHP
PHP Associative Arrays

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An associative array is an array where each element is stored with a custom key rather than a numeric index.

Example
<!DOCTYPE html>
<html>
<body>
<?php
$person = array(
"name" => "Alice",
"age" => 30,
"city" => "New York"
);

var_dump($person);
?>
</body>
</html>

Try it yourself

Access Associative Arrays


Access elements using their keys:


Example
<!DOCTYPE html>
<html>
<body>
<?php
$person = array(
"name" => "Alice",
"age" => 30,
"city" => "New York"
);

echo $person["name"]."<br>"; // Outputs: Alice
echo $person["age"]; // Outputs: 30
?>
</body>
</html>

Try it yourself

Change Value


Modify elements by reassigning a value to an existing key:


Example
<!DOCTYPE html>
<html>
<body>
<?php
$person = array(
"name" => "Alice",
"age" => 30,
"city" => "New York"
);
$person["age"] = 31; // Updates the value of "age" to 31

var_dump($person);
?>
</body>
</html>

Try it yourself

Looping Through an Associative Array


You can loop through an associative array using a foreach loop:

Example
<!DOCTYPE html>
<html>
<body>
<?php
$person = array(
"name" => "Alice",
"age" => 30,
"city" => "New York"
);
foreach ($person as $key => $value) {
echo "$key: $value<br>";
}
?>
</body>
</html>

Try it yourself

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