php-substr函数问题

当我们使用substr显示字符串的一部分时，但如果我们的字符串具有锚定标记，则显示的字符串内容比其他字符串小

e、 g

$str1=只是印刷和排版行业的虚拟文本。自16世纪以来，Lorem Ipsum一直是行业标准的虚拟文本，当时一位不知名的印刷商拿起一个打印工具，将其拼凑成一本打印样本书。它不仅存活了五个世纪，而且还跨越到电子排版，基本上保持不变。它”；
$str2=“只是印刷和排版行业的虚拟文本。自16世纪以来，Lorem Ipsum一直是业界的标准模仿者，当时一位不知名的印刷商拿着一个印刷机，将其拼凑成一本印刷样书。它不仅存活了五个世纪，而且还跨越到电子排版，基本上保持不变。它”；
$str1Count=strlen（$str1）；//357
$str2Count=strlen（$str2）；//393
如果（$str1计数>300）{
echo substr（$str1,0300）。“

”；
}
/* 
输出：
只是印刷和排版行业的虚拟文本。自16世纪以来，Lorem Ipsum一直是印刷行业的标准虚拟文本，当时一位不知名的印刷商拿着一个铅字槽，抢着制作一本铅字样本书。它不仅存活了五个世纪，而且还跨越了el
*/
如果（$str2计数>300）{
echo substr（$2,0300）；
}
/* 
输出：
只是印刷和排版行业的虚拟文本。从16世纪开始，Lorem Ipsum就一直是印刷行业的标准虚拟文本，当时一位不知名的印刷商拿起一个印刷工具，将其拼凑成一本字体样本书。它不仅存活了五年
*/

但根据我的需要，它必须显示到“进入el”

请先帮我谢谢。

使用它

function limit_words($string, $word_limit){
    $words = explode(" ",$string);
    return implode(" ",array_splice($words,0,$word_limit));
}

您可能需要使用

---

注意：在检查字符串长度时，不要忘记使用

strip\u标记。
这会起作用，但会删除超链接。是否要保持超链接完整

<?php   

$str1="is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It";

$str2="is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy <a href='http://www.google.com'>text</a> ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It";

$str1Count=strlen(strip_tags($str1)); // 357

$str2Count=strlen(strip_tags($str2)); // 393

if($str1Count > 300){
   echo substr(strip_tags($str1),0,300)."<br/><br/>";
}

/* 
output:
is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into el
*/


if($str2Count > 300){
    echo substr(strip_tags($str2),0,300);
}

/* 
output:
is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy <a href='http://www.google.com'>text</a> ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five 
*/

?>


说真的，这些是你能想到的最短的字符串示例？：/20个字符怎么样？你是否尝试过
回显htmlspecialchars（substr（$str2,0300））；
（如果你在浏览器中显示结果）？htmlspecialchars（）直到“只有五个”才显示“为什么要用这个？”？？OP不想拆分单词。@bansi这将给出正确的结果，并且（字符串具有锚定标记，然后显示的字符串内容比其他字符串小）不会出现问题
echo substr(strip_tags($str2),0,300);

<?php   

$str1="is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It";

$str2="is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy <a href='http://www.google.com'>text</a> ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It";

$str1Count=strlen(strip_tags($str1)); // 357

$str2Count=strlen(strip_tags($str2)); // 393

if($str1Count > 300){
   echo substr(strip_tags($str1),0,300)."<br/><br/>";
}

/* 
output:
is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into el
*/


if($str2Count > 300){
    echo substr(strip_tags($str2),0,300);
}

/* 
output:
is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy <a href='http://www.google.com'>text</a> ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five 
*/

?>