How to remove spaces from variables in php

How to remove spaces in variables in php: 1. Delete spaces in strings through trim method; 2. Replace spaces with preg_replace method; 3. Replace spaces with str_replace function.

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

How to remove variable spaces in php?

php remove spaces from string

##1, Commonly used methods trim

Example:

$test = " abc";
//方法一：函数把 HTML 实体转换为字符。
$converted = html_entity_decode($test),chr(0xc2).chr(0xa0);  
//方法二：
$converted = strtr($myHTML, array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES))); 
//php:45:string ' abc' (length=5) 
$converted = trim($converted,chr(0xC2).chr(0xA0)); 
// should work
var_dump($converted);

Hexadecimal conversion: 0xC2 to  0xA0 to space

The official chr(0xC2).chr(0xA0) is not very If you understand what it means, friends who know can leave a message below

2, use preg_replace to replace

Example:

$str = ' t e  s t';
$str = preg_replace('/\s+/', '', $str);
// 将会改变为'test'

3, use str_replace to replace

Example

$str = " t e  s t";
$str=str_replace(" ",'',$str);
echo $str

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