PHP The for Loop
The for loop is used when you know in advance how many times the script should run.
- init: Mostly used to set a counter (but can be any code to be executed once at the beginning of the loop)
- condition: Evaluated for each loop iteration. If it evaluates to TRUE, the loop continues. If it evaluates to FALSE, the loop ends.
- increment: Mostly used to increment a counter (but can be any code to be executed at the end of the iteration)
Note: The init and increment parameters above can be empty or have multiple expressions (separated by commas).
The example below defines a loop that starts with i=1. The loop will continue to run as long as the variable i is less than, or equal to 5. The variable i will increase by 1 each time the loop runs:
The foreach Loop
The foreach loop is used to loop through arrays.
For every loop iteration, the value of the current array element is assigned to $value (and the array pointer is moved by one) - so on the next loop iteration, you'll be looking at the next array value.
The following example demonstrates a loop that will print the values of the given array: