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php array operation methods: array(), array_diff(), array_fill(), array_filter(), arsort(), asort(), compact(), count(), each(), end() , key(), etc.
The operating environment of this tutorial: Windows 7 system, PHP version 7.1, DELL G3 computer
PHP Array method allows you to access and operate the array .
php array operation method
| Function | Description |
|---|---|
| array() | Create an array. |
| array_change_key_case() | Returns an array whose keys are all uppercase or lowercase. |
| array_chunk() | Split an array into new array chunks. |
| array_column() | Returns the value of a single column in the input array. |
| array_combine() | Create a new array by merging two arrays (one for key names and one for key values). |
| array_count_values() | is used to count the number of occurrences of all values in the array. |
| array_diff() | Compares arrays and returns the difference between the two arrays (only comparing key values). |
| array_diff_assoc() | Compare arrays and return the difference between the two arrays (compare key names and key values). |
| array_diff_key() | Compare arrays and return the difference between the two arrays (only comparing key names). |
| array_diff_uassoc() | Compare arrays and return the difference set of two arrays (compare key names and key values, use user-defined key name comparison function). |
| array_diff_ukey() | Compare arrays and return the difference between the two arrays (only compare key names, use user-defined key name comparison function). |
| array_fill() | Fills the array with the given key value. |
| array_fill_keys() | Fills the array with the key value given the specified key name. |
| array_filter() | Use the callback function to filter the elements in the array. |
| array_flip() | Reverse/exchange the key names in the array and the corresponding associated key values. |
| array_intersect() | Compares arrays and returns the intersection of two arrays (only comparing key values). |
| array_intersect_assoc() | Compare arrays and return the intersection of the two arrays (compare key names and key values). |
| array_intersect_key() | Compare arrays and return the intersection of the two arrays (only compare key names). |
| array_intersect_uassoc() | Compare arrays and return the intersection of two arrays (compare key names and key values, use user-defined key name comparison function). |
| array_intersect_ukey() | Compare arrays and return the intersection of the two arrays (only compare key names, use user-defined key name comparison function). |
| array_key_exists() | Check whether the specified key name exists in the array. |
| array_key_first() | Get the first key value of the specified array. |
| array_key_last() | Get the last key value of the specified array. |
| array_keys() | Returns all key names in the array. |
| array_map() | Apply the user-defined function to each value of the given array and return the new value. |
| array_merge() | Merge one or more arrays into one array. |
| array_merge_recursive() | Recursively merge one or more arrays into one array. |
| array_multisort() | Sort multiple arrays or multidimensional arrays. |
| array_pad() | Inserts the specified number of elements with the specified value into the array. |
| array_pop() | Delete the last element in the array (pop). |
| array_product() | Calculate the product of all values in an array. |
| array_push() | Insert one or more elements into the end of the array (push). |
| array_rand() | Randomly select one or more elements from the array and return the key name. |
| array_reduce() | By using a user-defined function, iteratively reduces the array to a string and returns it. |
| array_replace() | Replace the value of the first array with the value of the subsequent array. |
| array_replace_recursive() | Recursively replace the value of the first array with the value of the subsequent array. |
| array_reverse() | Reverse the order of elements in the original array, create a new array and return it. |
| array_search() | Search for the given value in the array and return the corresponding key name if successful. |
| array_shift() | Deletes the first element in the array and returns the value of the deleted element. |
| array_slice() | Returns the selected portion of the array. |
| array_splice() | Remove the specified element from the array and replace it with other values. |
| array_sum() | Returns the sum of all values in the array. |
| array_udiff() | Compares arrays and returns the difference between the two arrays (only compares key values, using a user-defined key name comparison function). |
| array_udiff_assoc() | Compare arrays and return the difference between the two arrays (compare key names and key values, use built-in functions to compare key names, use user-defined function compares key values). |
| array_udiff_uassoc() | Compare arrays and return the difference set of two arrays (compare key names and key values, use two user-defined key name comparison functions) . |
| array_uintersect() | Compares arrays and returns the intersection of two arrays (only compares key values, using a user-defined key comparison function). |
| array_uintersect_assoc() | Compare arrays and return the intersection of two arrays (compare key names and key values, use built-in functions to compare key names, use user-defined functions Compare key values). |
| array_uintersect_uassoc() | Compare arrays and return the intersection of the two arrays (compare key names and key values, using two user-defined key name comparison functions). |
| array_unique() | Remove duplicate values from the array. |
| array_unshift() | Insert one or more elements at the beginning of the array. |
| array_values() | Returns all the values in the array. |
| array_walk() | Apply a user function to each member of the array. |
| array_walk_recursive() | Applies a user function recursively to each member of an array. |
| arsort() | Sort the associative array in descending order by key value. |
| asort() | Sort the associative array in ascending order by key value. |
| compact() | Creates an array containing variable names and their values. |
| count() | Returns the number of elements in the array. |
| current() | Returns the current element in the array. |
| each() | Returns the current key/value pair in the array. |
| end() | Point the internal pointer of the array to the last element. |
| extract() | Import variables from the array into the current symbol table. |
| in_array() | Checks whether the specified value exists in the array. |
| key() | Get the key name from the associative array. |
| krsort() | Sort the associative array in descending order by key name. |
| ksort() | Sort the associative array in ascending order by key name. |
| list() | Assign the values in the array to some array variables. |
| natcasesort() | Use the "natural sorting" algorithm to sort the array in a case-insensitive manner. |
| natsort() | Sort the array using the "natural sorting" algorithm. |
| next() | Move the internal pointer in the array backward one position. |
| pos() | Alias for current(). |
| prev() | Rewind the internal pointer of the array by one bit. |
| range() | Creates an array containing elements in the specified range. |
| reset() | Point the internal pointer of the array to the first element. |
| rsort() | Sort the numeric array in descending order. |
| shuffle() | Rearrange the elements in the array in random order. |
| sizeof() | An alias for count(). |
| sort() | Sort the numeric array in ascending order. |
| uasort() | Use a user-defined comparison function to sort the key values in the array. |
| uksort() | Use a user-defined comparison function to sort the key names in the array. |
| usort() | Sort the array using a user-defined comparison function. |
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