How to repeat a string using str_repeat function in PHP

In PHP programming, we often need to use the same string to be repeated multiple times, such as output delimiters, string padding, etc. At this time, you can use the str_repeat function in PHP to repeat the string.

The str_repeat function is a built-in function used to repeat a string several times. Its syntax is as follows:

string str_repeat ( string $input , int $multiplier )

Among them, $input is the string to be repeated, and $multiplier is repeated frequency. The return value is the repeated string.

Let’s look at some examples:

Example 1:

$str = "PHP";
echo str_repeat($str, 3);

The output result is:

PHPPHPPHP

Example 2:

$str = "*";
echo str_repeat($str, 10);

The output result is:

**********

Example 3:

$str = "Hello World! ";
echo str_repeat($str, 5);

The output result is:

Hello World! Hello World! Hello World! Hello World! Hello World!

As can be seen from the above example, the str_repeat function is very concise, clear and very practical. . Using it can greatly reduce the amount of code and time cost when we program.

It should be noted that the $multiplier parameter cannot be a negative number, otherwise a Warning warning will be thrown and an empty string will be returned. When the value of $multiplier is 0, the function will directly return an empty string. In addition, the $input parameter can also receive an empty string, in which case an empty string will be returned directly.

The above is an introduction to how to use the str_repeat function in PHP to repeat a string. Hope this helps PHP beginners!

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