8/15/2023 0 Comments While loop in foreach php![]() ![]() However, since this is a do-while loop, we get an iteration for free. With a regular while loop, nothing would ever be printed to the user, because $i is 0, and therefore not less than 0 at any point. Here is an example showing just this behavior: " This means that with the do-while loop, you are guaranteed at least one iteration - with a regular while loop, the code within it may never be reached, if the statement is never evaluated to true. This one works almost exactly like the while loop, with one important difference: With the while loop, the statement is checked before the loop is entered - with the do-while loop, it's checked at the end of an iteration. Whatever you decide to put between the parentheses of the while loop, it has to be able to evaluate into a Boolean value, that is, true or false. Each time the loop iterates, we add 1 to the counting value, $i, as well as output the current value. It will count to 4, since we continue until $i is no longer less than 5. It simply repeats the block of code as long as the statement inside it evaluates to true. ![]() The while loop is probably the simplest of them all. This chapter will walk through all of them, explaining how they work with an example. That's what we use loops for, and PHP offers us 4 different looping mechanisms. ![]() Here is an example.As within any other programming language, the ability to repeat a piece of code X number of times is very important. One for loop can be kept inside another for loop and we can generate different scripts using nested loops. $no=count($a) // Number of elements in array We can get the number of elements and use that in our condition checking. This is not a good idea as the count() function returns the same value in each iteration all the time. Here we are counting number of elements in array in each iteration. We can get number of elements in an array by using count(). Read how to display elements of an array Speed of looping This will list all the values of the array from starting to end. So we need not call the reset() again( Reset() rewinds array's internal pointer to the first element. Once the foreach function is called the array pointer will reset to the first element of the array. While handling PHP Arrays foreach function is required to display the elements of an array. If the condition to check is never meet then it will be an infinite loop execution and PHP execution will hang or stop after reaching maximum execution time. We can reduce the step value in each step of iteration. Similarly $i -=10 is same as $i=$i-10 Decrement step value in loop ![]() Now we will use a step value of 10 so the variable $i will increase its value by 10 ( it was increasing by 1 in previous cases ) in each looping. This increase or step value can be changed. So far we have seen each time the variable value is increased by 1. The If condition inside the for loop will exit the loop when the value of $i exceeds 5 ( that is when it equals to 6) Check the ouput just outside the for loop.Įcho " Value of \$i Outside the loop: ".$i īy using break we can exit the loop without completing the total required loopings (early exit). Here condition is checked ( Expr 2) at the staring of the loop.Įxpr3 is executed at the end of the loop. Next time when the value of $i becomes 11 the condition checking fails and the loop is escaped without executing. So in the first loop the value of $i became 1 and in the last loop the value equals to 10. In above case the loop is executed 10 times and each time the value of $i is increased by 1. For and foreach loop in PHP with break statement and creating patterns using nested for loops ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |