Learn how to do all this yourself by joining our Simplilearn’s Postgraduate Program in Full Stack Web Development. A loop runs a given number of times regardless of the conditions. As a result, this loop is ideally suited to cases where you know exactly when the code block needs to run. It may determine the number of times the execution will take place. Now, PHP for loop is used to run code segments multiple times. Using foreach, PHP code blocks will be run multiple times, each with its own piece. They're designed to work with PHP variables that are more complex, such as arrays and objects. Syntax:įoreach loops in PHP have a specific function. Iterating over arrays is done with the foreach loop. Since the condition is checked at the end of the loop iteration rather than at the beginning, a do-while loop will always be executed once, even if the conditional expression is false. The while loop differs from the do-while loop in one significant way: with a while loop, the condition to be evaluated is checked at the start of each loop iteration, so the loop can never be executed if the conditional expression evaluates to false. Syntax:ĭifference Between While Loop and Do… While Loop A do-while loop executes a block of code once, then evaluates the condition if the condition is true, the statement is repeated as long as the stated condition is true. The while loop is a version of the do-while loop in which the condition is evaluated at the end of each loop iteration. The loop continues if it evaluates to TRUE. Which is used in the loop counter to initialize the value, it will be executed only once. Syntax:įor ( initializing value condition checking increment)įor (init counter test counter increment counter)įollowing example demonstrates the simple usage of for loop At the end of each iteration, it is evaluated. Increment - it adds a new value to the loop counter.

Which is a second argument and also called a conditional checking part. If it evaluates to false, the loop is terminated. The loop continues if it evaluates to true, and the nested statements are executed.

State - condition is assessed at the start of each iteration. Initialization is used to set the counter variables, and it is checked once unconditionally before the loop's body is executed. The following are the definitions of the for loop parameters: Initialization: This saves the user time and effort from having to write the same code several times.

In PHP, a loop and for loop is used to execute a statement or a block of statements several times until and until a certain condition is met, much as in any other language. Since the condition is checked at the end of the loop iteration rather than the beginning, a do-while loop will always be executed once, even if the conditional expression is false. It helps users to centralize all loop-related statements. When I already know how many times it wants to execute a block of code, use a for loop. If the number of iterations is specified, it should be used otherwise, a while loop should be used. The PHP for loop function can be used to iterate over a set of code for a set number of times. It's usually used to repeat a block of code a certain number of times. For loop is a control structure that repeats a block of code as long as a condition is met.

Php array iteration