This was done inside the while loop execution block. The third expression is where we increment or decrement the counter.This was the main expression in the while loop. The second expression is our condition ( $i The first expression sets up the counter ( $i = 1) In the while loop this counter was outside and above the loop.Let’s do a breakdown of the expressions in the for loop: The example above is the same as the while and do-while loops. We then fetch their email address and send them an email. When we want to send an email to everyone on the list, we will need to iterate through all the users in the database one by one. Iteration helps us with repetitive tasks and when dealing with big data.Īs an example, let’s consider a database for a mailing list which contains entries for a name and email address. Many times we will need to alter this flow and allow specific sections of code to be repeated multiple times.įor this purpose, PHP offers us various types of iteration, or looping, logic which are capable of repeating sections of code. It starts at the top and flows sequentially to the bottom. And finally, we compare each loop and explain when to use which one.īy default, the flow of an application written in PHP is sequential.
We also cover so called nested loops, which are loops inside other loops. We learn how PHP can help us iterate through sections of code with while, do-while, for and foreach loop statements.
#Php echo once how to
In this tutorial, we learn how to control the flow of our application even further. Iteration Control (loops) PHP Loops (while, do while, foreach & for) Tutorial
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