Looping statements in PHP are used to execute the same block of code a specified number of times. LoopingVery often when you write code, you want the same block of code to run a number of times. You can use looping statements in your code to perform this. In PHP we have the following looping statements:
The while StatementThe while statement will execute a block of code if and as long as a condition is true. Syntax
ExampleThe following example demonstrates a loop that will continue to run as long as the variable i is less than, or equal to 5. i will increase by 1 each time the loop runs:
The do…while StatementThe do…while statement will execute a block of code at least once – it then will repeat the loop as long as a condition is true. Syntax
ExampleThe following example will increment the value of i at least once, and it will continue incrementing the variable i as long as it has a value of less than 5:
The for StatementThe for statement is the most advanced of the loops in PHP. In it’s simplest form, the for statement is used when you know how many times you want to execute a statement or a list of statements. Syntax
Parameters:
Note: Each of the parameters can be empty or have multiple expressions separated by commas.
ExampleThe following example prints the text “Hello World!” five times:
The foreach StatementThe foreach statement is used to loop through arrays. For every loop, the value of the current array element is assigned to $value (and the array pointer is moved by one) – so on the next loop, you’ll be looking at the next element. Syntax
ExampleThe following example demonstrates a loop that will print the values of the given array:
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PHP Looping
11 May 2009 Leave a comment
in PHP Tags: Looping, php, PHP lessons, PHP Looping, PHP Tutorial, tutorials, web
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