How to delete blank strings in php

How to delete blank strings in php: 1. Use trim to remove ordinary spaces on both sides of the string; 2. Use str_replace to delete; 3. Delete through strtr; 4. Use "function trimall($str){ ...}" method to delete.

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

How to delete blank strings in php? How to remove spaces from string in php?

1. Use the php function trim():

 trim($str)

to remove ordinary spaces on both sides of the string;

2. Use the php function: str_replace():

str_replace(' ','',$str)

3. Use the php function: strtr():

strtr($str,array(' '=>''))

4. Use the encapsulation function you wrote:

function trimall($str)//删除空格
{
    $limit=array(" ","　","\t","\n","\r");
    $rep=array("","","","","");
    return str_replace($limit,$rep,$str); 
}

5. Use this regular expression to remove ordinary spaces:

preg_replace('# #', '', $str)

6. Use this regular rule to remove all spaces including full-width spaces:

$str =preg_replace("/\s|　/","",$str);

Recommended study: "javascript Advanced Tutorial"

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