Some functions of the PHP operation array. Search for a specific value in the array. if TRUE is returned, FALSEbooleanin_array (mixedneedle, arrayhaystack [, booleanstrict]) is returned. find a specified key in the array, if a specific value is searched in the array, TRUE is returned if Yes; otherwise FALSE is returned.
Boolean in_array (mixed needle, array haystack [, boolean strict])
Find a specified key in the array. If yes, return TRUE. Otherwise, return FALSE.
Boolean array_eky_exists (mixed key, array)
Search for a specific value in the array. If yes, return TRUE. Otherwise, return FALSE.
Boolean array_search (mixed needle, array haystack [, boolean strict])
Obtains a new array composed of all the keys in the array.
Array array_keys (array [, mixed search_value])
Obtains a new array composed of all values of the array.
Array array_values (array)
Determine the array size
Integer count (array [, int mode])
Integer sizeof (array [, int mode])
Count the occurrence frequency of array elements
Array array_count_values (array)
Deletes repeated values in an array and returns an array consisting of unique values.
Array array_unique (array)
Returns the element order of the array. if the value of preserve_key is TRUE, the order of the key values of the array remains unchanged.
Array array_reverse (array [, boolean preserve_key])
Replace the array key and value
Array array_flip (array)
Sort arrays sequentially. the sort_flags parameter is optional. default behavior.
SORT_NUMBERIC, sorted by numerical value, useful for sorting integers or floating-point numbers
SORT_REGULAR, sorted by ASCII value
SORT_STRING, which is sorted by the correct order of the nearest person
The key-value sequence of the asort function remains unchanged.
Void sort (array [, int sort_flags])
Void asort (array [, int sort_flags])
Array sorting in reverse order. the sort_flags parameter is optional. default behavior.
SORT_NUMBERIC, sorted by numerical value, useful for sorting integers or floating-point numbers
SORT_REGULAR, sorted by ASCII value
SORT_STRING, which is sorted by the correct order of the nearest person
The order of the key values of the arsort function remains unchanged.
Void rsort (array [, int sort_flags])
Void arsort (array [, int sort_flags])
Natural sorting of arrays
Void natsort (array)
Case-insensitive natural sorting
Void natcasesort (array)
Sort the key-value pairs in an array
Boolean ksort (array [, int sort_flags])
Sort the key-value pairs in reverse order.
Boolean krsort (array [, int sort_flags])
Sort by user-defined order
Void usort (array, callback function_name)
Merges the arrays to return a Union array. Array_merge overwrites the front, and array_merge_recursive is merged.
Array array_merge (array array1 [array array2…]) // More than one
Array array_merge_recursive (array array1, array array2 [, array…]) // More than two
Key and value form a new array
Array array_combine (array key, array value)
Returns a part of the array, starting from the offset and ending at the offse + length position.
Array array_slice (array, int offset [, int length])
Delete all elements starting from offset to ending with offset + length, and return the deleted elements as arrays.
Array array_splice (array, int offset [, int length [, array peplacement])
Returns the intersection of arrays. The key value is the key value in the first array.
Array array_intersect (array array1, array array2 [, arrayN…])
The intersection of the array contains the same key value. The key value is the key value of the first array.
Array array_intersect_assoc (array array1, array array2 [, arrayN…])
Evaluate the difference set of the array. the first array does not have values in other arrays.
Array array_diff (array array1, array array2 [, arrayN…])
Evaluate the difference set of the array. the first array does not have the same key value in other arrays.
Array array_diffassoc (array array1, array array2 [, arrayN…])
Returns one or more key values in the array.
Mixed array_rand (array [, int num_entries])
Shuffling function
Void shuffle (array input_array)
Summation of values in the array
Mixed array_sum (array );
Splits an array into a multi-dimensional array that contains size elements.
Array array_chunk (array, int size [, boolean preserve_keys])
Using boolean in_array (mixed needle, array haystack [, boolean strict]) find a specified key in the array, if...
