Why We Need Loops: A Simple ExampleĬonsider the following need: “I want to write a function that prints out integers in sequence, beginning with 0 and going up to any number. In PHP, we have the following loop types: while - loops through a block of code as long as the specified condition is true do.while - loops through a. Generally speaking, using foreach loops is the most optimised way to loop through an array, and is also the easiest to read. ![]() To code these sorts of repeated tasks in PHP, loops are pretty much the only game in town. Thus, a do-while loop the block of code is executed once. In programming, this might be “for each user in the WordPress database: retrieve that user’s username, continuing until all usernames have been retrieved.” Or literally zillions of other examples. It evaluates the condition at the end of each loop iteration. The foreach () loop work specifically with arrays. The loop will start from the first element of the array and work through all the elements in order until it reaches the end. In life, this might be “for each dish in the sink: soap, scrub, and rinse the dish, then put it in the drying rack, continuing until the sink is empty.” Or literally zillions of other examples. A foreach loop in PHP is perfect for looping through elements part of an indexed array or an associative array. In programming, as in life, an extremely common need is to do a similar thing over and over again. The while statement will loops through a block of code as long as the condition specified in the while statement evaluate to true.A common need in programming is to repeat a similar action multiple times. The foreach() loop work specifically with arrays. Theres a site that has a lot of performance tests on various functions in PHP that do similar things, such as for vs. ![]() But, of course, there are always some exceptions. Luckily, while loops have the same behavior and syntax across most programming languages. Learning how to use a while loop is extremely important if you are new to programming. You will also learn how to loop through the values of array using foreach() loop at the end of this chapter. Updated PHP In this short tutorial, we will be touching on how to write a while loop in PHP. foreach - loops through a block of code for each element in an array.for - loops through a block of code until the counter reaches a specified number.If the condition is true the statement is repeated as long as the specified condition is true. do…while - the block of code executed once and then condition is evaluated. ![]() while loops through a block of code if and as long as a specified. This call works just fine if it's outside a foreach loop. PHP - Loop Types for loops through a block of code a specified number of times.
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