PHP - 将字符串添加到特定字符位置的现有字符串

问题描述：

我想在第20个字符位置添加字符串（制作collapser）。PHP - 将字符串添加到特定字符位置的现有字符串

$link = '<span class="collapse"">' 
$string = "Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quam earum ex voluptate autem cupiditate tempora neque quis aliquam asperiores ab debitis nemo cumque, fuga quae, esse illum aut aliquid rem." 

// Trying to add $link to $string at 20th character position

看看这里的字符串的一部分中替换文本 - > http://stackoverflow.com/questions/8251426/insert-string -at-specified-position某人已经问过类似的问题 –

答

使用substr_replace()它

$link = '<span class="collapse"">'; 
$string = "Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quam earum ex voluptate autem cupiditate tempora neque quis aliquam asperiores ab debitis nemo cumque, fuga quae, esse illum aut aliquid rem."; 

echo $newstr = substr_replace($string, $link, 20,0);

DEMO

PHP - 将字符串添加到特定字符位置的现有字符串

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