PHP syntax: for loop basics

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From the computer of: qmchenry (338 recipes)
Created: Feb 01, 2004     Updated: Jun 19, 2006

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The for loop allows iteration a fixed number of times.

The basic for loop syntax is:

The initialization defines the loop variable and its initial value (such as $i=1). The loop will continue to iterate while the conditional expression evaluates as true (like $i<10). Each time the loop is executed, the incrementor code is exectued (the code $i++ would increment the loop variable $i by one; $i=$i*2 would double the loop variable $i each iteration).

Putting these together in a simple example,

This code would generate the output "1 3 5 7 9" since the variable $i starts at 1 and increments by two each loop until it is no longer less than or equal to 10.