So I have a list of numbers (in PHP, we use the array language construct to contain and identify a list), and each iteration through it we’re seeing a number, which we’re showing to ourselves via an echo command. Here’s our for loop, made into a simple foreach. Rather than going through an abstract sequence you iterate over a pre-set thing. These are: For loop is used to execute a group of action only for a specified number of times. I’ve always found PHP foreach loops much simpler to understand. PHP For Loop is a loop statement which can be used in various forms to execute a block of code continuously as long as the condition of the loop is true, and stops only when the condition fails. If you’ve never seen this syntax before though, it’s a lot to wrap your head around. What’s great about this code is that if you’ve seen a for loop before (with its weird three-clause syntax of “start condition”, “continue condition”, “per loop operation”), this reads quite simply. You’ll probably use a for loop, like this: for ($x = 1 $x " Let’s say you want a segment of code to run 20 times. In PHP, you’ll use a for loop mostly when you want to iterate through a set of numbers. But before we get too deep on the foreach loop I do think there’s value in covering how these two popular things differ. The for loop is the most complex loop that behaves like in the C language. These include for loop, while and do while and the foreach loop. PHP improves on the for loop with the foreach loop. PHP supports different types of loops to iterate through a given block of code. ![]() Anyone who’s programmed much in any language has heard of a for loop. When there is only one statement in the while loop statement, the curly braces can also be omitted when there is only one statement in the do while statement code block. A "code block" is a statement or a compound statement (block of code). Usually this expression is the value computed using a comparison operator or a logical operator. The calculation result of "expression" in the while loop must be a boolean TRUE or FALSE, and if it is a value of other type, it will be automatically converted to a boolean value. Continue to execute the code in the statement block when the judgment is true, and break out of the loop until the value of the expression is false. The PHP for Loop The for loop is used when you know in advance how many times the script should run. Sometimes a situation arises that makes us want to exit from a loop. The for loop - Loops through a block of code a specified number of times. After the execution is over, return to the expression to continue the judgment. A break statement is an intentional interruption that prevents the loop from running. ![]() When the expression evaluates to true, the PHP block within the loop body will be executed. The syntax of a while loop is as follows: The characteristics of this statement are: first judge the expression, and execute the corresponding statement when the expression result is true. The function of the while loop is to repeatedly perform an operation, and it is the simplest one of the loop statements. In this section, we mainly introduce the while and do while loop statements. Four loop control statements are provided in PHP, namely while, do while, for and foreach loop statements.
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