How to clear spaces and line breaks in php

php method to clear spaces and line breaks: 1. Clear through the "function clearHtml($str){...}" method; 2. Remove through the "strip_tags()" function; 3. Clear through regular expressions .

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How to clear spaces and line breaks in php?

PHP removes string spaces and line breaks html tags

Method one

function clearHtml($str) 
{ 
    $str = trim($str); //清除字符串两边的空格
    $str = preg_replace("/\t/","",$str); //使用正则表达式替换内容，如：空格，换行，并将替换为空。
    $str = preg_replace("/\r\n/","",$str); 
    $str = preg_replace("/\r/","",$str); 
    $str = preg_replace("/\n/","",$str); 
    $str = preg_replace("/ /","",$str);
    $str = preg_replace("/  /","",$str);  //匹配html中的空格
    return trim($str); //返回字符串
}

Method two:

strip_tags() function strips HTML, XML and PHP Tag of.

strip_tags() function official introduction: http://www.php.net/manual/zh/function.strip-tags.php

Add to the above method.

function ClearHtml($str) 
{ 
    $str = trim($str); //清除字符串两边的空格
    $str = strip_tags($str,""); //利用php自带的函数清除html格式
    $str = preg_replace("/\t/","",$str); //使用正则表达式替换内容，如：空格，换行，并将替换为空。
    $str = preg_replace("/\r\n/","",$str); 
    $str = preg_replace("/\r/","",$str); 
    $str = preg_replace("/\n/","",$str); 
    $str = preg_replace("/ /","",$str);
    $str = preg_replace("/  /","",$str);  //匹配html中的空格
    return trim($str); //返回字符串
}

Method 3: Regular expression

Remove blank lines inside the string:

$str = preg_replace("/(s*?r?ns*?)+/","n",$str);

Remove all blank lines, including the inside and the beginning and the end:

$str = preg_replace('/($s*$)|(^s*^)/m', '',$str);

The above three methods can remove spaces and newline html tags in PHP strings.

Recommended learning: "PHP Video Tutorial"

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