How to remove empty lines from string in php

php method to remove empty lines from strings: 1. Create a PHP sample file; 2. Use the "function DeleteHtml($str){...}" method to remove empty lines or spaces in html. .

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

How to remove empty lines from strings in php?

PHP removes blank lines and blank functions in html

function DeleteHtml($str){  
                    $str = trim($str);  
                    $str = ereg_replace("\t","",$str);  
                    $str = ereg_replace("\r\n","",$str);  
                    $str = ereg_replace("\r","",$str);  
                    $str = ereg_replace("\n","",$str);  
                    return trim($str);  
                }

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