Replace line feed and carriage return in form input box in php_PHP tutorial

A summary of some methods for replacing line feeds and carriage returns in form input boxes in PHP. Friends in need can refer to this article.

The code is as follows

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代码如下	复制代码
?$str="this is a test n"; $patten = array("rn", "n", "r"); ?//先替换掉rn,然后是否存在n,最后替换r $str=str_replace($order, "", $str); ?>

?$str="this is a test n";
$patten = array("rn", "n", "r");

?//Replace rn first, then whether n exists, and finally replace r

代码如下

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//1、使用str_replace 来替换换行 $str = str_replace(array("rn", "r", "n"), "", $str); //2、使用正则替换 $str = preg_replace('//s*/', '', $str); //3、使用php定义好的变量 （建议使用） $str = str_replace(PHP_EOL, '', $str); ?/* * 获得用户操作系统的换行符,n * @access public * @return string */ function get_crlf() { if (stristr($_SERVER['HTTP_USER_AGENT'], 'Win')) { $the_crlf = 'rn'; } elseif (stristr($_SERVER['HTTP_USER_AGENT'], 'Mac')) { $the_crlf = 'r'; // for old MAC OS } else { $the_crlf = 'n';//权重大一点 } return $the_crlf; }

$str=str_replace($order, "", $str);

?>

代码如下

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$content=empty($_POST['content'])?null:trim($_POST['content']); if(!empty($content))echo str_replace("r",'rl',nl2br($content)); echo "r".' ----------分割线----------------------'."r"; if(!empty($content))echo str_replace("n",'nl',nl2br($content)); echo "n".' ----------分割线----------------------'."n"; if(!empty($content))echo str_replace("r",'rl',str_replace("n",'nl',nl2br($content))); echo "r".' ----------分割线---------------------- '."n"; echo 'hello'."n".'boys!'; echo 'hello'."r".'boys!'; ?>

?//php There are three ways to solve it

The code is as follows

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//1. Use str_replace to replace newlines $str = str_replace(array("rn", "r", "n"), "", $str); //2. Use regular replacement $str = preg_replace('//s*/', '', $str); //3. Use variables defined by php (recommended) $str = str_replace(PHP_EOL, '', $str); ?/* * Get the newline character of the user's operating system, n * @access public * @return string */ function get_crlf() { If (stristr($_SERVER['HTTP_USER_AGENT'], 'Win')) {           $the_crlf = 'rn'; } elseif (stristr($_SERVER['HTTP_USER_AGENT'], 'Mac')) {            $the_crlf = 'r'; // for old MAC OS } else {             $the_crlf = 'n';//The weight is bigger } Return $the_crlf; }

Test code

The code is as follows	Copy code
----------Separating line----------------------'."r "; if(!empty($content))echo str_replace("n",'nl',nl2br($content)); echo "n".' ----------Separating line----------------------'."n "; if(!empty($content))echo str_replace("r",'rl',str_replace("n",'nl',nl2br($content))); echo "r".' ----------Separating line---------------------- '."n"; echo 'hello'."n".'boys!'; echo 'hello'."r".'boys!'; ?>

1. The PHP function nl2br() inserts an HTML newline character before each new line (rn) in the string:
;
2. The newline under Windows is (rn);
3. In Notepad, r or n have the function of line break;

Note: When the front page is displayed, use nl2br to change the line break to

http://www.bkjia.com/PHPjc/632174.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632174.htmlTechArticleA summary of some methods for replacing line feeds and carriage returns in form input boxes in php. Friends in need can refer to this article . The code is as follows Copy the code ?php ?$str=this is a test n; $patten = arra...