note 97688 deleted from function.nl2br by danbrown
| From: | danbrown@php.net | Date: | Mon, 03 May 2010 16:03:42 +0000 |
| Subject: | note 97688 deleted from function.nl2br by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-168889@lists.php.net to get a copy of this message | ||
Note Submitter: gx
----
*Strictly* reverts PHP's nl2br() effects (whether it was used in XHTML mode or not):
<?php
function nl2br_revert($string) {
return preg_replace('
<br(?: /)?>([\\n\\r])', '$1',
$string);
}
?>
Indeed, in a string which was just nl2br'd:
- a BR added by PHP is directly followed by a \n or a \r character, and vice versa
- a PHP-added BR is either "<br />" or "<br>" (no need to match
"<br/>", "<br />", "<BR>"...)
Thus this function only removes PHP-added BRs (which "strictly reverts" meant).
The following would be even more logical, as nl2br() doesn't use both BR forms at once:
<?php
function nl2br_revert_bis($string) {
$br = preg_match('<br>[\\n\\r]', $string) ? '<br>'
: '<br />';
return preg_replace('' . $br . '([\\n\\r])', '$1',
$string);
}
?>
If you don't want to use regular expressions, here are "plain" alternatives:
<?php
function nl2br_revert_noregex($string) {
// watch for order in arrays
// (the first 2 elements are for the case nl2br() was used in old HTML mode)
$string = str_replace( array("<br>\n", "<br>\r",
"<br />\n", "<br />\r"),
array("<br />\n", "<br />\r",
"\n", "\r"),
$string );
}
function nl2br_revert_bis_noregex($string) {
$br = (strpos($string,"<br>\n")!==false ||
strpos($string,"<br>\r")!==false) ? '<br>' : '<br
/>';
return str_replace( array( $br."\n",
$br."\r"),
array( "\n",
"\r"),
$string );
}
?>