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# Arrays

• Introduction
• Installing/Configuring
• Predefined Constants
• Sorting Arrays
• Array Functions
• array_change_key_case — Changes all keys in an array
• array_chunk — Split an array into chunks
• array_combine — Creates an array by using one array for keys and another for its values
• array_count_values — Counts all the values of an array
• array_diff_assoc — Computes the difference of arrays with additional index check
• array_diff_key — Computes the difference of arrays using keys for comparison
• array_diff_uassoc — Computes the difference of arrays with additional index check which is performed by a user supplied callback function
• array_diff_ukey — Computes the difference of arrays using a callback function on the keys for comparison
• array_diff — Computes the difference of arrays
• array_fill_keys — Fill an array with values, specifying keys
• array_fill — Fill an array with values
• array_filter — Filters elements of an array using a callback function
• array_flip — Exchanges all keys with their associated values in an array
• array_intersect_assoc — Computes the intersection of arrays with additional index check
• array_intersect_key — Computes the intersection of arrays using keys for comparison
• array_intersect_uassoc — Computes the intersection of arrays with additional index check, compares indexes by a callback function
• array_intersect_ukey — Computes the intersection of arrays using a callback function on the keys for comparison
• array_intersect — Computes the intersection of arrays
• array_key_exists — Checks if the given key or index exists in the array
• array_keys — Return all the keys or a subset of the keys of an array
• array_map — Applies the callback to the elements of the given arrays
• array_merge_recursive — Merge two or more arrays recursively
• array_merge — Merge one or more arrays
• array_multisort — Sort multiple or multi-dimensional arrays
• array_pad — Pad array to the specified length with a value
• array_pop — Pop the element off the end of array
• array_product — Calculate the product of values in an array
• array_push — Push one or more elements onto the end of array
• array_rand — Pick one or more random entries out of an array
• array_reduce — Iteratively reduce the array to a single value using a callback function
• array_replace_recursive — Replaces elements from passed arrays into the first array recursively
• array_replace — Replaces elements from passed arrays into the first array
• array_reverse — Return an array with elements in reverse order
• array_search — Searches the array for a given value and returns the corresponding key if successful
• array_shift — Shift an element off the beginning of array
• array_slice — Extract a slice of the array
• array_splice — Remove a portion of the array and replace it with something else
• array_sum — Calculate the sum of values in an array
• array_udiff_assoc — Computes the difference of arrays with additional index check, compares data by a callback function
• array_udiff_uassoc — Computes the difference of arrays with additional index check, compares data and indexes by a callback function
• array_udiff — Computes the difference of arrays by using a callback function for data comparison
• array_uintersect_assoc — Computes the intersection of arrays with additional index check, compares data by a callback function
• array_uintersect_uassoc — Computes the intersection of arrays with additional index check, compares data and indexes by a callback functions
• array_uintersect — Computes the intersection of arrays, compares data by a callback function
• array_unique — Removes duplicate values from an array
• array_unshift — Prepend one or more elements to the beginning of an array
• array_values — Return all the values of an array
• array_walk_recursive — Apply a user function recursively to every member of an array
• array_walk — Apply a user function to every member of an array
• array — Create an array
• arsort — Sort an array in reverse order and maintain index association
• asort — Sort an array and maintain index association
• compact — Create array containing variables and their values
• count — Count all elements in an array, or properties in an object
• current — Return the current element in an array
• each — Return the current key and value pair from an array and advance the array cursor
• end — Set the internal pointer of an array to its last element
• extract — Import variables into the current symbol table from an array
• in_array — Checks if a value exists in an array
• key — Fetch a key from an array
• krsort — Sort an array by key in reverse order
• ksort — Sort an array by key
• list — Assign variables as if they were an array
• natcasesort — Sort an array using a case insensitive "natural order" algorithm
• natsort — Sort an array using a "natural order" algorithm
• next — Advance the internal array pointer of an array
• pos — Alias of current
• prev — Rewind the internal array pointer
• range — Create an array containing a range of elements
• reset — Set the internal pointer of an array to its first element
• rsort — Sort an array in reverse order
• shuffle — Shuffle an array
• sizeof — Alias of count
• sort — Sort an array
• uasort — Sort an array with a user-defined comparison function and maintain index association
• uksort — Sort an array by keys using a user-defined comparison function
• usort — Sort an array by values using a user-defined comparison function

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