Multan Institute of Information Technology
Arrays in PHP
What is an array in PHP?
Array is a box (variable) in which you can keep many things under a single name. Meaning there is no need to create a separate variable for each value, everything is stored in a single array.
Types Of Arrays in PHP
There are 3 types of Arrays in PHP
- Indexed array
- Associative array
- Multidimensional array
Indexed Array:In this every value is associated with a number (index). Counting always starts from 0.
Associative Array:In this names (keys) are given instead of numbers. This makes understanding data easier.
Multidimensional Array:This is a little advanced. In this there are other arrays inside the array. In this way complex data can also be stored easily.
Main work of Arrays
Creating an array: Using [] or array().
Taking a value: Using number in an indexed array, and using key in an associative array.
Inserting a new value: Using [] or array_push().
Deleting a value:unset() → To delete a specific value.
array_pop() → Removes the last value.
array_shift() → Removes the first value and adjusts the rest.
Built-in functions:For sorting → sort(), asort()
For searching → in_array()
For counting → count()
For merging → array_merge()
Mixed values: An array can store numbers, strings, booleans, objects and other arrays together.
