How do I reverse an array in PHP?
PHP | array_reverse() Function. This inbuilt function of PHP is used to reverse the elements of an array including the nested arrays. Also, we have an option of preserving the key elements according to the users choice. This function accepts an array as parameter and returns the array with elements in reversed order.
What is Array_keys () used for in PHP?
The array_keys() is a built-in function in PHP and is used to return either all the keys of and array or the subset of the keys. … If this parameter is passed then the function will return keys coressponding to this element only otherwise it will return all keys of the array.
How do you reverse an array?
- Syntax. Its syntax is as follows − array.reverse();
- Return Value. Returns the reversed single value of the array.
- Example. Try the following example. …
- Output. Reversed array is : 3,2,1,0.
What is the correct way of declaring PHP variable?
A variable starts with the $ sign, followed by the name of the variable. A variable name must start with a letter or the underscore character. A variable name cannot start with a number. A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
What is Array_flip function in PHP?
The array_flip() function is used to exchange the keys with their associated values in an array. The function returns an array in flip order, i.e. keys from array become values and values from array become keys.
What is PHP call function?
A PHP function provides code that a PHP script can call to perform a task, such as Count(), file_get_contents(), and header(). The PHP language supports both procedural and object-oriented programming paradigms.
What syntax should be written in PHP code?
Explanation: PHP previously stood for Personal Home Page now stands for Hypertext Preprocessor. 3. What should be the correct syntax to write a PHP code? … Explanation: Every section of PHP code starts and ends by turning on and off PHP tags to let the server know that it needs to execute the PHP in between them.
What is the use of Print_r in PHP?
The print_r() function is a built-in function in PHP and is used to print or display information stored in a variable.
Is in array in PHP?
The in_array() function is an inbuilt function in PHP. The in_array() function is used to check whether a given value exists in an array or not. It returns TRUE if the given value is found in the given array, and FALSE otherwise.
How can I find the difference between two arrays in PHP?
The array_diff() is an inbuilt function in PHP ans is used to calculate the difference between two or more arrays. This function computes difference according to the values of the elements, between one or more array and return differences in the form of a new array.