Can’t PHP use for loop?

php can use for loop. PHP for loop is used when the number of times the script needs to be run is known in advance. Its usage syntax is "for (initial value; condition; increment) {code to be executed;}" .

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

Can’t I use a for loop in php?

php can use for loop.

PHP Loops - For Loops

Loop through a block of code a specified number of times, or when a specified condition is true.

for loop

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

Syntax

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 anything that is executed once at the beginning of the loop code).

Conditions: Restrictions on 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 variable i is less than or equal to 5, the loop will continue to run. Each time the loop runs, variable i will be incremented by 1:

Example

<?php
for ($i=1; $i<=5; $i++)
{
    echo "数字为 " . $i . PHP_EOL;
}
?>

Output:

数字为 1
数字为 2
数字为 3
数字为 4
数字为 5

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