PHP array
PHP arrays are powerful tools for storing multiple values within a single variable. This capability allows developers to organize data efficiently, accessing elements through indexes, which can be either numeric or string-based keys. An array is essentially a collection of variables, each referred to as an element. These elements can be directly retrieved using their specific indexes, simplifying data manipulation and retrieval in PHP programming.
Array Creation and Initialization
| Function | Details |
| Creating an Array | How to create and assign keys |
| array_fill_keys() | Create array by filling keys and value |
| array_fill() | Filling an array with value |
| array_column() | Displaying one column data of an array |
| Multidimensional Array | Creating and displaying elements of Multidimensional array |
| array_range | Create array using a range with optional step value |
| Breaking string | We can split a string and create a array by using all words. |
Displaying, Checking and counting elements
| Function | Details |
| array_count_values | calculate the frequency of occurrence of elements inside a array |
| Displaying elements | Listing all elements of the array |
| array_is_list() | checks if an array is a list |
| is_array | To check the variable is array or not |
| array_size() | How many elements are present inside the array? We can find out by count or sizeof() function. |
| array_max() | Maximum minimum value present inside array |
| array_rand | Randomly collecting elements of an array |
| array_sum | Total value or sum of the elements present inside an array |
| array_shuffle | randomizes the order of the elements of an array |
Array Modification
| Function | Details |
| array_chunk() | Split an array into chunks |
| array_change_key_case() | Changing keys to upper case or lower case chars |
| array_splice() | Modifying Arrays in PHP |
| array_replace() | Replace the values of the array |
| array_replace_recursive() | Merge Arrays Recursively |
| array_walk() | Passing user defined function to each element of an array |
| array_walk_recursive() | Traversing multi-dimensional array |
Array Sorting
| Function | Details |
| Sorting | Sorting all elements of an array by sort command |
| array_multisort() | Sorting Multiple Arrays |
| usort() | Sort the elements using a user-defined function |
Array Searching
| Function | Details |
| in_array() | Check the presence of an element inside an array. Returns True or False |
| array_search() | Returns the key if matching found, FALSE otherwise |
| array_key_exists() | Search Key, returns TRUE if found, FALSE otherwise |
| array_keys() | Returns an array of keys |
| array_key_first() | Get the first key of the array (>= PHP 7.3) |
| array_key_last() | Get the last key of the array (>= PHP 7.3) |
Array Filtering and Extraction
| Function | Details |
| array_filter() | Creating new array using filter (callback) function |
| array_reduce() | Iteratively reduces an array to a single value |
| array_map() | Apply native or user-defined functions to each element |
| array_unique() | Set of unique values from an array |
Array Merging and Combining
| Function | Details |
| array_merge() | Add one array to another |
| array_merge_recursive() | Merge arrays recursively |
| array_combine() | Create an array with keys from one and values from another |
Array Intersection
| Function | Details |
| array_diff() | Generate a third array by differentiating two arrays |
| array_diff_assoc() | Generate a third array by differentiating two arrays (keys and values) |
| array_intersect() | Intersection of arrays considering values only |
| array_intersect_assoc() | Intersection of arrays considering keys and values |
| array_intersect_key() | Intersection of arrays considering keys only |
| array_intersect_uassoc() | Intersection of arrays considering keys & values through callback function |
| array_intersect_ukey() | Intersection of arrays considering keys through callback function |
| array_uintersect | intersection of arrays with Custom Comparison |
| array_udiff_uassoc | compare arrays based on custom rules |
| array_uintersect_uassoc | Intersect Arrays with Custom Data and Key Comparisons |
| array_uintersect_assoc | array intersections with custom value comparison |
Array Difference
| Function | Details |
| array_diff_uassoc | Resultant third array by differentiating values and (keys through callback function) |
| array_diff_ukey | Resultant third array by comparing keys through callback function |
| array_udiff | Resultant third array by comparing values through callback function |
| array_diff_key | We can generate a resultant third array by differentiating two arrays by considering keys only |
Array Adding & Removing Elements
| Function | Details |
| array_pop() | Removing last element of the array |
| array_shift() | Removing first element of the array |
| array_unset() | Removing element from any position |
| array_push() | Adding elements at the end |
| array_unshift() | Adding elements at the beginning |
Array Traversing & Navigation
| Function | Details |
| Current | Get the current element of the array |
| Next | Move to the next element |
| Previous | Move to the previous element |
| End | Move to the last element |
| Reset | Move to the first element |
Array Form Handling and Session Management
| Function | Details |
| Array checkbox | Getting checkbox value using array |
| http_build_query | generate query string using elements to pass through URL |
| Session array | create a session array and carry same data across the pages. |
| function | Passing and returning array from a function |
| Cookies | Cookies array adding and deleting elements |
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