How to clear html, spaces, newlines, and extract plain text in php

php method to clear html, spaces, newlines, and extract plain text: 1. Remove blank lines inside the string, the code is [$str = preg_replace('',$str)]; 2. Clear characters For spaces on both sides of the string, the code is [$str = trim($str)].

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php method to clear html, spaces, newlines, and extract plain text:

Method 1:

function DeleteHtml($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
}

Call method

DeleteHtml($str);

$str is the page string that needs to be cleared

Method 2:

Remove blank lines inside the string:

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

Remove all blank lines, including internal And head and tail:

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

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