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array_keys() returns the keys, numeric and string, from the array. If a filter_value is specified, then only the keys for that value are returned. Otherwise, all the keys from the array are returned.
- In array
Parameters. needle. The searched value. Note: . If needle is...
- Array push
I can only assume that PHP sorts the array as elements are...
- Array reduce
array_reduce (PHP 4 >= 4.0.5, PHP 5, PHP 7, PHP 8)...
- Array slice
Parameters. array. The input array. offset. If offset is...
- Array Search
Parameters. needle. The searched value. Note: . If needle is...
- Count
[Editor's note: array at from dot pl had pointed out that...
- Array Combine
This will seem obvious to some, but if you need to preserve...
- List
Like array(), this is not really a function, but a language...
- In array
Returns an array containing the keys: PHP Version: 4+ Changelog: The strict parameter was added in PHP 5.0
The key () function simply returns the key of the array element that's currently being pointed to by the internal pointer. It does not move the pointer in any way. If the internal pointer points beyond the end of the elements list or the array is empty, key () returns null.
An array can be created using the array () language construct. It takes any number of comma-separated key => value pairs as arguments. array ( key => value, key2 => value2, key3 => value3, ... The comma after the last array element is optional and can be omitted.
Learn how to use the PHP array_keys() function to get the keys of an array. See examples of indexed, associative, and filtered arrays, and how to use strict comparison and callback functions.
Learn how to use the PHP array_keys function to get all the keys of an array, or to search for a specific value in an array. See the syntax, examples, and advantages of this versatile and easy-to-use tool for PHP developers.
The array_keys() function return all the keys or a subset of the keys of an array. The following table summarizes the technical details of this function. Return Value:
