Introduction to php for loop usage examples, php examples_PHP tutorial

Introduction to php for loop usage examples, php examples

for loop is used when you know in advance the number of times the script needs to be run.

Grammar

for (初始值; 条件; 增量)
{
要执行的代码;
}

Parameters:

• Initial value: Mainly initializes a variable value, used to set a counter (but can be any code that is executed once at the beginning of the loop).
• Condition: Restriction conditions for loop execution. If TRUE, the loop continues. If FALSE, the loop ends.
• Increment: Mainly used to increment the counter (but can be any code that is executed at the end of the loop).

Note: The above initial value and increment parameters can be empty, or have multiple expressions (separated by commas).

The following example defines a loop with an initial value of i=1. As long as the variable i is less than or equal to 5, the loop will continue to run. Each time the loop runs, the variable i will be incremented by 1:

<?php
for ($i=1; $i<=5; $i++)
{
echo "The number is " . $i . "<br>";
}
?>

Output:

The number is 1
The number is 2
The number is 3
The number is 4
The number is 5

Original address: http://www.manongjc.com/php/php_while.html

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