PHP trim() function

PHP String Function

Mga halimbawa

Alisin ang mga character sa bawat dakong baba ng string ("Hello" na may "He" at "World" na may "d!" sa loob):

<?php
$str = "Hello World!";
echo $str . "<br>";
echo trim($str,"Hed!");
?>

Run Instance

Paglilinang at paggamit

Ang function na trim() ay nag-alisin ng mga puti na nasa bawat dakong baba at itaas ng string o iba pang naipinalagay na character.

Mga kaugnay na function:

  • ltrim() - Alisin ang mga puti na nasa bawat dakong baba ng string o iba pang naipinalagay na character.
  • rtrim() - Alisin ang mga puti na lalamunan ng string o iba pang naipinalagay na character.

pangungusap

trim(s
tring,charlist)
parameter pagsasalita
string Mga kinakailangan. Ang paglilitis ng string na dapat suriin.
charlist

Optional. Specify which characters to remove from the string. If omitted, the following characters are removed:

  • "\0" - NULL
  • "\t" - Tab
  • "\n" - Newline
  • "\x0B" - Vertical Tab
  • "\r" - Carriage Return
  • " " - Space

Technical Details

Return Value: Return the modified string
PHP Version: 4+
Update Log: Added in PHP 4.1: charlist Parameter.

More Examples

Example 1

Remove spaces from both sides of the string:

<?php
$str = " Hello World! ";
echo "Not using trim: " . $str;
echo "<br>";
echo "Use trim: " . trim($str);
?>

The HTML output of the above code is as follows (please check the source code):

<!DOCTYPE html>
<html>
<body>
Not using trim:  Hello World! <br>Using trim: Hello World!
</body>
</html>

The browser output of the above code is as follows:

Not using trim: Hello World!
Use trim: Hello World!

Run Instance

Example 2

Remove newline characters (\n) from both sides of the string:

<?php
$str = "\n\n\nHello World!\n\n\n";
echo "Not using trim: " . $str;
echo "<br>";
echo "Use trim: " . trim($str);
?>

The HTML output of the above code is as follows (please check the source code):

<!DOCTYPE html>
<html>
<body>
Not using trim:
Hello World!
<br>Use trim: Hello World!
</body>
</html>

The browser output of the above code is as follows:

Not using trim: Hello World!
Use trim: Hello World!

Run Instance

PHP String Function