Remove newlines (\n) from both sides of the string in PHP

Description

The following code shows how to remove newlines (\n) from both sides of the string.

Example

/*from   w  ww  .  j  a  va 2  s. c om*/
<?php
    $str = "\n\n\nHello World!\n\n\n";
    echo "Without trim: " . $str;
    echo "<br>";
    echo "With trim: " . trim($str);
?>

The code above generates the following result.