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Trim(), preg_replace() in php to clear string spaces and consecutive spaces_PHP tutorial

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Release： 2016-07-13 16:56:57
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The simplest way to clear spaces in PHP is to use the trim() function, but this function often cannot achieve the results we want, especially when the string contains characters like \r\n, it cannot be produced. Yes, below I introduce a perfect method to solve this problem.

//Remove the starting and ending whitespace
$str = trim($str);
The code is as follows
 代码如下 复制代码

$str = " This line containstliberal rn use of whitespace.nn";

//去掉开始和结束的空白
$str = trim($str);

//去掉跟随别的挤在一块的空白
$str = preg_replace('/s(?=s)/', '', $str);

//最后，去掉非space 的空白，用一个空格代替
$str = preg_replace('/[nrt]/', ' ', $str);

echo "

{$str}
";

?>
Copy code

$str = "This line containsliberal rn use of whitespace.nn";

//Remove the white space that is crowded with others
$str = preg_replace('/s(?=s)/', '', $str);

//Finally, remove the non-space whitespace and replace it with a space
$str = preg_replace('/[nrt]/', ' ', $str);

Related labels：
php replace trim and exist string Clear of space continuous
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