How to Display Nested Associative Array in PHP?

The following article describes How to Display Nested Associative Array in PHP.

In order to display a 2D associative array in PHP, you can use nested loops to iterate over each key-value pair at each level and output them in a readable format. The following example shows the use of two foreach loops for displaying a nested associative array.

$employees = array(
    "John" => array(
        "age" => 30,
        "department" => "Sales"
    ),
    "Jane" => array(
        "age" => 35,
        "department" => "Marketing"
    )
);

foreach ($employees as $name => $data) {
    echo $name . ":<br>";
    foreach ($data as $key => $value) {
        echo "- " . $key . ": " . $value . "<br>";
    }
}

The following output will be shown.

John:
- age: 30
- department: Sales
Jane:
- age: 35
- department: Marketing

As can be seen, in the outer foreach loop, the $name variable represents the current key at the first level and the $data variable represents the nested associative array. So, the loop iterates over each key-value pair at the first level and outputs the name followed by a colon.

Likewise, in the inner foreach loop, the $key variable represents the current key at the second level and the $value variable represents the corresponding value. Also, here the loop iterates over each key-value pair at the second level and outputs the key and value preceded by a hyphen for each employee.

Furthermore, you can use any HTML tags or formatting within the echo statement to customize the output as desired.

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