PHP Array Functions

PHP provides a wide range of array functions to manipulate and interact with arrays. Here's a categorized list of commonly used PHP array functions with brief descriptions:

Array Creation & Manipulation

• array() – Creates an array.

• array_merge() – Merges one or more arrays.

• array_combine() – Combines two arrays (keys from one, values from another).

• array_slice() – Extracts a portion of an array.

• array_splice() – Removes or replaces elements.

• array_push() – Adds elements to the end.

• array_pop() – Removes the last element.

• array_unshift() – Adds elements to the beginning.

• array_shift() – Removes the first element.

Array Search & Check

• in_array() – Checks if a value exists.

• array_key_exists() – Checks if a key exists.

• array_search() – Searches for a value and returns the key.

Array Keys & Values

• array_keys() – Returns all keys.

• array_values() – Returns all values.

Sorting Arrays

• sort() – Sorts array in ascending order.

• rsort() – Sorts array in descending order.

• asort() – Sorts array while maintaining key association.

• ksort() – Sorts by key in ascending order.

• krsort() – Sorts by key in descending order.

Array Filtering & Mapping

• array_filter() – Filters elements using a callback function.

• array_map() – Applies a callback to elements.

• array_walk() – Applies a callback to elements by reference.

• array_reduce() – Reduces array to a single value via a callback.

Array Set Operations

• array_unique() – Removes duplicate values.

• array_diff() – Computes the difference between arrays.

• array_intersect() – Computes intersection of arrays.

Array Utility

• count() – Counts elements.

• sizeof() – Alias of count().

• array_sum() – Sums values.

• array_product() – Multiplies all values.

• array_rand() – Picks one or more random keys.

• shuffle() – Randomizes element order.