Quick Answer: How Can I Reverse A String Without Using Predefined Function In PHP?

Which function is used to reverse a string?

strrevThe strrev() function is used to reverse the given string.

Syntax: char *strrev(char *str);.

How do I replace a word in a string in PHP?

Answer: Use the PHP str_replace() function You can use the PHP str_replace() function to replace all the occurrences of a word within a string. In the following example the word “facts” is replaced by the word “truth”.

How do I reverse an array in PHP?

PHP: array_reverse() function The array_reverse() function is used to reverse the order of the elements in an array. Specifies the name of the array. Specify TRUE or FALSE whether function shall preserve the array’s keys or not. The default value is FALSE.

How can I reverse a string in C++ without function?

C, C++ Program to Reverse a String without using Strrev FunctionInitialize a variable.Take a input from user.Count the length of a input string, As we are not using any in-built function.Swap the position of an element.

How do you reverse an array using recursion?

Recursive Way : Initialize start and end indexes as start = 0, end = n-1. Swap arr[start] with arr[end] Recursively call reverse for rest of the array.Sep 8, 2020

How do you reverse an array pointer?

Approach : In reverse function we take two pointers one pointing at the beginning of the array, other pointing at end of the array. The contents of the memory location pointed by these two pointers are swapped and then the value of first pointer is increased and that of second pointer is decreased .

Which function is used to reverse a string in PHP?

strrevReversing string using strrev(): The strrev() function is a built-in function available in PHP and is used to reverse strings. This function takes a string as argument and returns a reversed string. Reversing string using recursion and substr(): We can also reverse a string using recursion and substr() function.

How can we reverse an array without function in PHP?

php //Task 21 reverse array $reverseArray = array(1, 2, 3, 4); $tmpArray = array(); $arraySize = sizeof($reverseArray); for($i

How do I reverse a string?

How to reverse String in Javapublic class StringFormatter {public static String reverseString(String str){StringBuilder sb=new StringBuilder(str);sb.reverse();return sb.toString();}}

How do you reverse a string in a for loop?

Reverse The String Using FOR Loop in C//Reverse the String using FOR Loop.#include #include int main(void){char *str=”ForgetCode”;printf(“Reverse the String:”);for(int i=(strlen(str)-1);i>=0;i–){ printf(“%c”,str[i]);More items…

How do you reverse an array?

Algorithm to reverse an arrayInput the number of elements of an array.Input the array elements.Traverse the array from the last.Print all the elements.Mar 11, 2020

How can I reverse a string without inbuilt function?

reverse(s) by passing the given string.import java.util.Scanner;public class ReverseStringExample3.{public static void main(String[] arg){ReverseStringExample3 rev=new ReverseStringExample3();Scanner sc=new Scanner(System.in);System.out.print(“Enter a string : “);More items…

What is Strrev PHP?

The strrev() function is a built-in function in PHP and is used to reverse a string. … If a number is passed to it instead of a string, it will also reverse that number. Return Value: The strrev() function returns the reversed string or the number.

How do I reverse a string in STL?

Let’s see the simple example to reverse the given string:#include #include #include using namespace std;int main() {string str = “Hello Myself Nikita”;cout << "Before Reverse : "<< str << endl;reverse(str. begin(), str. end());More items...

How do I reverse an array order in C++?

Algorithm to reverse an arrayFirst of all take number of elements as input from user. Let it be N.Then ask user to enter N numbers and store it in an array(lets call it inputArray).Declare another array of size equal to input array.Using a for loop, copy elements from inputArray to reverseArray in reverse order.

How do you reverse a string?

Method 1: Reverse a string by swapping the charactersInput the string from the user.Find the length of the string. The actual length of the string is one less than the number of characters in the string. … Repeat the below steps from i = 0 to the entire length of the string.rev[i] = str[j]Print the reversed string.Mar 11, 2020

Why the string is immutable?

The string is Immutable in Java because String objects are cached in the String pool. … Mutable String would produce two different hashcodes at the time of insertion and retrieval if contents of String was modified after insertion, potentially losing the value object in the map.

How do you reverse a number?

Where reverse is a variable representing the reverse of number.Step 1 — Isolate the last digit in number. lastDigit = number % 10. … Step 2 — Append lastDigit to reverse. reverse = (reverse * 10) + lastDigit. … Step 3-Remove last digit from number. number = number / 10. … Iterate this process. while (number > 0)Nov 1, 2016