In PHP <\/a>array is the collection of elements with common identifiers (identifiers are used to name<\/b>\u00a0variables <\/a>,<\/b>\u00a0functions, constants, and classes),can have different Datatypes \u00a0<\/a>and continuous in memory .<\/p>\n Important points Related to Array in PHP\u00a0<\/strong><\/p>\n Types Of Array:<\/strong><\/p>\n In above line $collect<\/strong> is array variable ,array<\/strong> is syntax of array function and red , yellow ,123,false are \u00a0the element of array.<\/p>\n there are other ways to declare array in PHP<\/p>\n for example<\/p>\n in above example we are adding element in array\u00a0 $collection[] simply adding the value in array variable.<\/p>\n we also add element in array thru Index like<\/p>\n these type of array called Indexed arrays\u00a0<\/b>these different method are used according to requirement .<\/p>\n To find out length of an array or number of element in array we can use count() function .<\/p>\n eg. count ($collection);<\/p>\n output will be 5 since we are added 5 element in array form 0-city to 4-school.<\/p>\n <\/p>\n Useful Function of array in PHP<\/strong><\/p>\n Shuffle array :<\/strong> \u00a0\u00a0This function\u00a0is use to\u00a0shuffle\u00a0or \u00a0randomizes the order of the elements in an\u00a0array.<\/p>\n Sort\u00a0array<\/strong> :\u00a0This function sort arrays in ascending order, To\u00a0 sort arrays in descending order we use\u00a0\u00a0rsort()<\/p>\n Syntax: sort($array_name)<\/strong>;\u00a0rsort($array_name)<\/strong><\/p>\n Other sort function<\/p>\n Slice\u00a0array :<\/strong>if you wanted some element from an array then you can use slice function<\/p>\n $array = array_slice($array, 0, 2)<\/strong>;<\/p>\n The second parameter is the start point ( 0 means to start from the beginning of the array).<\/p>\n The third parameter is the length of the resulting array<\/p>\n Merge\u00a0array:<\/strong> To merge to array wen can use array_merge()<\/strong> function<\/p>\n the above will result an array consisting element of both the array.<\/p>\n What are Arrays in PHP ? 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How to define array in php?<\/h2>\n
\n$collect=array<\/strong>(\\'red\\',\\'yellow\\',\\'123\\',false); <\/code><\/pre>\n \n$collection[]=\\'city\\';\n\n$collection[]=\\'phone\\';\n\n$collection[]=\\'dob\\'; <\/code><\/pre>\n \n\n$collection[3]=\\'sport\\';\n\n$collection[4]=\\'school\\';\n <\/code><\/pre>\nHow to display or use the value of an array<\/strong><\/h3>\n
\n
\nfor($i=0;i<$n; $i++)\n{\necho\\\"Element at i Index is $collection[$i]\\\";\n}\n<\/code><\/pre>\n\n
\nSyntax: shuffle($array_name); <\/code><\/pre>\n\n
\n\n$array = array_merge ($array1,$array2);<\/strong>\n <\/code><\/pre>\n\n\n
\n \n Array Function syantax<\/h4>\n<\/th>\n
\n Description of function<\/h4>\n<\/th>\n<\/tr>\n
\n array()<\/td>\n Creates an array<\/td>\n<\/tr>\n \n array_change_key_case()<\/td>\n Changes all keys in an array to lowercase or uppercase<\/td>\n<\/tr>\n \n array_chunk()<\/td>\n Splits an array into chunks of arrays<\/td>\n<\/tr>\n \n array_column()<\/td>\n Returns the values from a single column in the input array<\/td>\n<\/tr>\n \n array_combine()<\/td>\n Creates an array by using the elements from one \\”keys\\” array and one \\”values\\” array<\/td>\n<\/tr>\n \n array_count_values()<\/td>\n Counts all the values of an array<\/td>\n<\/tr>\n \n array_diff()<\/td>\n Compare arrays, and returns the differences (compare values only)<\/td>\n<\/tr>\n \n array_diff_assoc()<\/td>\n Compare arrays, and returns the differences (compare keys and values)<\/td>\n<\/tr>\n \n array_diff_key()<\/td>\n Compare arrays, and returns the differences (compare keys only)<\/td>\n<\/tr>\n \n array_diff_uassoc()<\/td>\n Compare arrays, and returns the differences (compare keys and values, using a user-defined key comparison function)<\/td>\n<\/tr>\n \n array_diff_ukey()<\/td>\n Compare arrays, and returns the differences (compare keys only, using a user-defined key comparison function)<\/td>\n<\/tr>\n \n array_fill()<\/td>\n Fills an array with values<\/td>\n<\/tr>\n \n array_fill_keys()<\/td>\n Fills an array with values, specifying keys<\/td>\n<\/tr>\n \n array_filter()<\/td>\n Filters the values of an array using a callback function<\/td>\n<\/tr>\n \n >array_flip()<\/td>\n Flips\/Exchanges all keys with their associated values in an array<\/td>\n<\/tr>\n \n array_intersect()<\/td>\n Compare arrays, and returns the matches (compare values only)<\/td>\n<\/tr>\n \n array_intersect_assoc()<\/td>\n Compare arrays and returns the matches (compare keys and values)<\/td>\n<\/tr>\n \n array_intersect_key()<\/td>\n Compare arrays, and returns the matches (compare keys only)<\/td>\n<\/tr>\n \n array_intersect_uassoc()<\/td>\n Compare arrays, and returns the matches (compare keys and values, using a user-defined key comparison function)<\/td>\n<\/tr>\n \n array_intersect_ukey()<\/td>\n Compare arrays, and returns the matches (compare keys only, using a user-defined key comparison function)<\/td>\n<\/tr>\n \n array_key_exists()<\/td>\n Checks if the specified key exists in the array<\/td>\n<\/tr>\n \n array_keys()<\/td>\n Returns all the keys of an array<\/td>\n<\/tr>\n \n array_map()<\/td>\n Sends each value of an array to a user-made function, which returns new values<\/td>\n<\/tr>\n \n array_merge()<\/td>\n Merges one or more arrays into one array<\/td>\n<\/tr>\n \n array_merge_recursive()<\/td>\n Merges one or more arrays into one array recursively<\/td>\n<\/tr>\n \n array_multisort()<\/td>\n Sorts multiple or multi-dimensional arrays<\/td>\n<\/tr>\n \n array_pad()<\/td>\n Inserts a specified number of items, with a specified value, to an array<\/td>\n<\/tr>\n \n array_pop()<\/td>\n Deletes the last element of an array<\/td>\n<\/tr>\n \n array_product()<\/td>\n Calculates the product of the values in an array<\/td>\n<\/tr>\n \n array_push()<\/td>\n Inserts one or more elements to the end of an array<\/td>\n<\/tr>\n \n array_rand()<\/td>\n Returns one or more random keys from an array<\/td>\n<\/tr>\n \n array_reduce()<\/td>\n Returns an array as a string, using a user-defined function<\/td>\n<\/tr>\n \n array_replace()<\/td>\n Replaces the values of the first array with the values from following arrays<\/td>\n<\/tr>\n \n array_replace_recursive()<\/td>\n Replaces the values of the first array with the values from following arrays recursively<\/td>\n<\/tr>\n \n array_reverse()<\/td>\n Returns an array in the reverse order<\/td>\n<\/tr>\n \n array_search()<\/td>\n Searches an array for a given value and returns the key<\/td>\n<\/tr>\n \n array_shift()<\/td>\n Removes the first element from an array, and returns the value of the removed element<\/td>\n<\/tr>\n \n array_slice()<\/td>\n Returns selected parts of an array<\/td>\n<\/tr>\n \n array_splice()<\/td>\n Removes and replaces specified elements of an array<\/td>\n<\/tr>\n \n >array_sum()<\/td>\n Returns the sum of the values in an array<\/td>\n<\/tr>\n \n array_udiff()<\/td>\n Compare arrays, and returns the differences (compare values only, using a user-defined key comparison function)<\/td>\n<\/tr>\n \n >array_udiff_assoc()<\/td>\n Compare arrays, and returns the differences (compare keys and values, using a built-in function to compare the keys and a user-defined function to compare the values)<\/td>\n<\/tr>\n \n array_udiff_uassoc()<\/td>\n Compare arrays, and returns the differences (compare keys and values, using two user-defined key comparison functions)<\/td>\n<\/tr>\n \n array_uintersect()<\/td>\n Compare arrays, and returns the matches (compare values only, using a user-defined key comparison function)<\/td>\n<\/tr>\n \n array_uintersect_assoc()<\/td>\n Compare arrays, and returns the matches (compare keys and values, using a built-in function to compare the keys and a user-defined function to compare the values)<\/td>\n<\/tr>\n \n array_uintersect_uassoc()<\/td>\n Compare arrays, and returns the matches (compare keys and values, using two user-defined key comparison functions)<\/td>\n<\/tr>\n \n array_unique()<\/td>\n Removes duplicate values from an array<\/td>\n<\/tr>\n \n array_unshift()<\/td>\n Adds one or more elements to the beginning of an array<\/td>\n<\/tr>\n \n array_values()<\/td>\n Returns all the values of an array<\/td>\n<\/tr>\n \n array_walk()<\/td>\n Applies a user function to every member of an array<\/td>\n<\/tr>\n \n array_walk_recursive()<\/td>\n Applies a user function recursively to every member of an array<\/td>\n<\/tr>\n \n arsort()<\/td>\n Sorts an associative array in descending order, according to the value<\/td>\n<\/tr>\n \n asort()<\/td>\n Sorts an associative array in ascending order, according to the value<\/td>\n<\/tr>\n \n compact()<\/td>\n Create array containing variables and their values<\/td>\n<\/tr>\n \n count()<\/td>\n Returns the number of elements in an array<\/td>\n<\/tr>\n \n current()<\/td>\n Returns the current element in an array<\/td>\n<\/tr>\n \n each()<\/td>\n Returns the current key and value pair from an array<\/td>\n<\/tr>\n \n end()<\/td>\n Sets the internal pointer of an array to its last element<\/td>\n<\/tr>\n \n extract()<\/td>\n Imports variables into the current symbol table from an array<\/td>\n<\/tr>\n \n in_array()<\/td>\n Checks if a specified value exists in an array<\/td>\n<\/tr>\n \n key()<\/td>\n Fetches a key from an array<\/td>\n<\/tr>\n \n krsort()<\/td>\n Sorts an associative array in descending order, according to the key<\/td>\n<\/tr>\n \n ksort()<\/td>\n Sorts an associative array in ascending order, according to the key<\/td>\n<\/tr>\n \n list()<\/td>\n Assigns variables as if they were an array<\/td>\n<\/tr>\n \n <\/td>\n Sorts an array using a case insensitive \\”natural order\\” algorithm<\/td>\n<\/tr>\n \n natsort()<\/td>\n Sorts an array using a \\”natural order\\” algorithm<\/td>\n<\/tr>\n \n next()<\/td>\n Advance the internal array pointer of an array<\/td>\n<\/tr>\n \n pos()<\/td>\n Alias of current()<\/td>\n<\/tr>\n \n prev()<\/td>\n Rewinds the internal array pointer<\/td>\n<\/tr>\n \n range()<\/td>\n Creates an array containing a range of elements<\/td>\n<\/tr>\n \n reset()<\/td>\n Sets the internal pointer of an array to its first element<\/td>\n<\/tr>\n \n rsort()<\/td>\n Sorts an indexed array in descending order<\/td>\n<\/tr>\n \n shuffle()<\/td>\n Shuffles an array<\/td>\n<\/tr>\n \n sizeof()<\/td>\n Alias of count()<\/td>\n<\/tr>\n \n sort()<\/td>\n Sorts an indexed array in ascending order<\/td>\n<\/tr>\n \n uasort()<\/td>\n Sorts an array by values using a user-defined comparison function<\/td>\n<\/tr>\n \n uksort()<\/td>\n Sorts an array by keys using a user-defined comparison function<\/td>\n<\/tr>\n \n usort()<\/td>\n Sorts an array using a user-defined comparison function<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"