![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Correction status：qualified
Teacher's comments：
Collection
Collection
<?php
$a = 'acjd';
echo strlen($a);
$b =['a','b','v','d'];
echo '<hr color="red">';
$c = implode('**',$b);
echo $c ;
$gg ='explode';
echo '<hr color="green">';
$gh = str_split($gg,2);
print_r($gh );
echo '<hr color="yellow">';
echo strpos('www.baidu.com','baidu');
echo "<hr color='black'>";
echo str_replace("baidu","taobao","www.baidu.com");
?>点击 "运行实例" 按钮查看在线实例
