<!DOCTYPE html> <html> <body> <?php $str = "\n\n\nHello World!\n\n\n"; echo "不使用 trim: " . $str; echo "<br>"; echo "使用 trim: " . trim($str); ?> </body> </html>
<?php $str = "\n\n\nHello World!\n\n\n"; echo "不使用 trim: " . $str; echo "<br>"; echo "使用 trim: " . trim($str); ?>