PHP Arrays

What Is an Array?

An array in PHP is a variable that can hold multiple values at once. Each value is associated with a key (either numeric or named).

Use arrays when you want to group related data.

Indexed Arrays

Indexed arrays use numeric keys (starting from 0):

You can also use the short array syntax:

Associative Arrays

Associative arrays use named keys instead of numeric indices:

You can also assign values manually:

Multidimensional Arrays

Arrays inside arrays (2D or more):

Array Functions

PHP provides many built-in functions to work with arrays:

• count() – Count number of elements
• array_push() – Add to the end
• array_pop() – Remove from the end
• array_shift() – Remove from the beginning
• array_unshift() – Add to the beginning
• sort() – Sort indexed arrays
• asort() – Sort associative arrays by value
• ksort() – Sort associative arrays by key

Check If It’s an Array

Use is_array() to confirm:

Need Help?

Ask the AI if you need help understanding or want to dive deeper into any topic