PHP Multidimensional Arrays
A PHP multidimensional array is an array that contains one or more arrays, which can be accessed using multiple indices.
Usage
Here's an example of a multidimensional array:
$students = [
['name' => 'John', 'age' => 30, 'gender' => 'male'],
['name' => 'Jane', 'age' => 25, 'gender' => 'female'],
['name' => 'Bob', 'age' => 28, 'gender' => 'male']
];
Looping through an multidimensional array
To loop through a multidimensional array, you can use nested foreach loops. Here's an example of how to loop through the $students array and print out each student's name and age:
foreach ($students as $student) {
foreach ($student as $key => $value) {
if ($key == 'name' || $key == 'age') {
echo "$key: $value\n";
}
}
echo "\n";
}
This will output:
name: John
age: 30
name: Jane
age: 25
name: Bob
age: 28
You can also use a for loop with the count function to loop through the outer array, and a foreach loop to loop through the inner arrays. Like so:
for ($i = 0; $i < count($students); $i++) {
foreach ($students[$i] as $key => $value) {
if ($key == 'name' || $key == 'age') {
echo "$key: $value\n";
}
}
echo "\n";
}
This will output the same as the first method.