I have a string:
[COLOR=gray]A bunch of text.[/COLOR]
And I would like to write a preg_replace that removes everything between "[COLOR=gray]" and "[/COLOR]" -- if it's possible to remove those tags as well, that's great, otherwise I can do a simple replace afterward.
$str = 'dfgdfg[COLOR=gray]A bunch of text.[/COLOR]dfgdfgdfgfg';
$str1 = preg_replace('/\[COLOR=gray\].*\[\/COLOR\]/',"",$str);
echo $str1;
OR
if COLOR is not always gray
$str = 'dfgdfg[COLOR=gray]A bunch of text.[/COLOR]dfgdfgdfgfg';
$str1 = preg_replace('/\[COLOR=\w+\].*\[\/COLOR\]/',"",$str);
echo $str1;
Related
I want to echo php text but not between (). Some thing like this =
<?php
$text = "Barry(male)";
echo $text;
?>
output =
Barry
How can i do this?
You can use preg_replace to substitute whatever is between parenthes (and the parentheses themselves) with an empty string. Like this:
<?php
$text = "Barry(male)";
echo preg_replace('#\(.*\)#', '', $text);
?>
Please note: since you didn't specify your string format, I'm assuming that the parenthesized text appears just once in the string and that there aren't nested parenthes. Otherwise, this doesn't work as expected.
Something like:
$text = "Barry(male)";
$split = explode("(", $text);
echo $split[0];
// "Barry"
I have a string, that look like this "<html>". Now what I want to do, is get all text between the "<" and the ">", and this should apply to any text, so that if i did "<hello>", or "<p>" that would also work. Then I want to replace this string with a string that contains the string between the tags.
For example
In:
<[STRING]>
Out:
<this is [STRING]>
Where [STRING] is the string between the tags.
Use a capture group to match everything after < that isn't >, and substitute that into the replacement string.
preg_replace('/<([^>]*)>/, '<this is $1>/, $string);
here is a solution to test on the pattern exists and then capture it to finally modify it ...
<?php
$str = '<[STRING]>';
$pattern = '#<(\[.*\])>#';
if(preg_match($pattern, $str, $matches)):
var_dump($matches);
$str = preg_replace($pattern, '<this is '.$matches[1].'>', $str);
endif;
echo $str;
?>
echo $str;
You can test here: http://ideone.com/uVqV0u
I don't know if this can be usefull to you.
You can use a regular expression that is the best way. But you can also consider a little function that remove first < and last > char from your string.
This is my solution:
<?php
/*Vars to test*/
$var1="<HTML>";
$var2="<P>";
$var3="<ALL YOU WANT>";
/*function*/
function replace($string_tag) {
$newString="";
for ($i=1; $i<(strlen($string_tag)-1); $i++){
$newString.=$string_tag[$i];
}
return $newString;
}
/*Output*/
echo (replace($var1));
echo "\r\n";
echo (replace($var2));
echo "\r\n";
echo (replace($var3));
?>
Output give me:
HTML
P
ALL YOU WANT
Tested on https://ideone.com/2RnbnY
I'm trying to use a regex to find and replace all URLs in a forum system. This works but it also selects anything that is within bbcode. This shouldn't be happening.
My code is as follows:
<?php
function make_links_clickable($text){
return preg_replace('!(([^=](f|ht)tp(s)?://)[-a-zA-Zа-яА-Я()0-9#:%_+.~#?&;//=]+)!i', '$1', $text);
}
//$text = "https://www.mcgamerzone.com<br>http://www.mcgamerzone.com/help/support<br>Just text<br>http://www.google.com/<br><b>More text</b>";
$text = "#Theareak We know this and [b][url=https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks]here[/url] [/b]is an explanation, we are trying to fix this asap! https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks aaa";
echo "<b>Unparsed text:</b><br>";
echo $text;
echo "<br><br>";
echo "<b>Parsed text:</b><br>";
echo make_links_clickable($text);
?>
All urls that occur in bb-code are following up on a = character, meaning that I don't want anything that starts with = to be selected.
I basically have that working but this results in selecting 1 extra character in in front of the string that should be selected.
I'm not very familiar with regex. The final output of my code is this:
<b>Unparsed text:</b><br>
#Theareak We know this and [b][url=https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks]here[/url] [/b]is an explanation, we are trying to fix this asap! https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks aaa<br>
<br>
<b>Parsed text:</b><br>
#Theareak We know this and [b][url=https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks]here[/url] [/b]is an explanation, we are trying to fix this asap! https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks aaa
You can match and skip [url=...] like this:
\[url=[^\]]*](*SKIP)(?!)|(((f|ht)tps?://)[-a-zA-Zа-яёЁА-Я()0-9#:%_+.\~#?&;/=]+)
See regex demo
That way, you will only match the URLs outside the [url=...] tag.
IDEONE demo:
function make_links_clickable($text){
return preg_replace('~\[url=[^\]]*](*SKIP)(?!)|(((f|ht)tps?://)[-a-zA-Zа-яёЁА-Я()0-9#:%_+.\~#?&;/=]+)~iu', '$1', $text);
}
$text = "#Theareak We know this and [b][url=https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks]here[/url] [/b]is an explanation, we are trying to fix this asap! https://www.mcgamerzone.com/news/67/False-positive-proxy-bans-and-bot-attacks aaa";
echo "<b>Parsed text:</b><br>";
echo make_links_clickable($text);
You can use a negative lookbehind (?<!=) instead of your negated class. It asserts that what is going to be matched isn't preceded by something.
Example
My code-
$input = "this text is for highlighting a text if it exists in a string. Let us check if it works or not";
$pattern ="/if/";
$replacement= "H1Fontbracket"."if"."H1BracketClose";
echo preg_replace($pattern, $replacement, $input);
Now the problem is that when i run this code, it splits into multiple lines, what else do i need to do so that i am able to get it in one line
Use str_replace rather than preg_replace. preg_replace will return an array of strings, and str_replace will just return the string:
echo str_replace($pattern, $replacement, $input);
What do you mean by multiple lines? Of course it'll show up as multiple lines on a webpage if you wrap the ifs in header tags. Headers are block elements. And more importantly, headers are headers. Not for highlighting text.
If you want to highlight something with HTML, you should probably use a span with a class, or you could use the HTML5 element mark:
$input = "this text is for highlighting a text if it exists in an iffy string.";
echo preg_replace('/\\bif\\b/', '<span class="highlighted">$0</span>', $input);
echo preg_replace('/\\bif\\b/', '<mark>$0</mark>', $input);
The \\b is to only match if words, and not just the if letters, which might be part of a different word. Then in your CSS you can decide how the marked words should show up:
.highlighted { background: yellow }
mark { background: yellow }
Or whatever. I would recommend that you read up a bit on how HTML and CSS works if you're going to make web pages :)
Try this
$input = "this text is for highlighting a text if
it exists in a string. Let us check if it works or not";
$pattern="if";
$replacement="<h1>". $pattern. "</h1>";
$input= str_replace($pattern,$replacement,$input);
echo "$input";
function highlight($str,$search){
$patterns = array('/\//', '/\^/', '/\./', '/\$/', '/\|/',
'/\(/', '/\)/', '/\[/', '/\]/', '/\*/', '/\+/',
'/\?/', '/\{/', '/\}/', '/\,/');
$replace = array('\/', '\^', '\.', '\$', '\|', '\(', '\)',
'\[', '\]', '\*', '\+', '\?', '\{', '\}', '\,');
$search = preg_replace($patterns, $replace, $search);
$search = str_replace(" ","|",$search);
return #preg_replace("/(^|\s)($search)/i",'${1}<span class=highlight>${2}</span>',$str);
}
<hr>I want to remove this text.<embed src="stuffinhere.html"/>
I tried using regex but nothing works.
Thanks in advance.
P.S. I tried this: $str = preg_replace('#(<hr>).*?(<embed)#', '$1$2', $str)
You'll get a lot of advice to use an HTML parser for this kind of thing. You should do that.
The rest of this answer is for when you've decided that the HTML parser is too slow, doesn't handle ill formed (i.e. standard in the wild) HTML, or is a pain in the ass to integrate into the system you don't control. I created the following small shell script
$str = '<hr>I want to remove this text.<embed src="stuffinhere.html"/>';
$str = preg_replace('#(<hr>).*?(<embed)#', '$1$2', $str);
var_dump($str);
//outputs
string(35) "<hr><embed src="stuffinhere.html"/>"
and it did remove the text, so I'd check your source documents and any other PHP code around your RegEx. You're not feeding preg_replace the string you think you are. My best guess is your source document has irregular case, or there's whitespace between the <hr /> and <embed>. Try the following regular expression instead.
$str = '<hr>I want to remove
this text.
<EMBED src="stuffinhere.html"/>';
$str = preg_replace('#(<hr>).*?(<embed)#si', '$1$2', $str);
var_dump($str);
//outputs
string(35) "<hr><EMBED src="stuffinhere.html"/>"
The "i" modifier says "make this search case insensitive". The "s" modifier says "the [.] character should also match my platform's line break/carriage return sequence"
But use a proper parser if you can. Seriously.
I think the code is self-explanatory and pretty easy to understand since it does not use regex (and it might be faster)...
$start='<hr>';
$end='<embed src="stuff...';
$str=' html here... ';
function between($t1,$t2,$page) {
$p1=stripos($page,$t1);
if($p1!==false) {
$p2=stripos($page,$t2,$p1+strlen($t1));
} else {
return false;
}
return substr($page,$p1+strlen($t1),$p2-$p1-strlen($t1));
}
$found=between($start,$end,$str);
while($found!==false) {
$str=str_replace($start.$found.$end,$start.$end,$str);
$found=between($start,$end,$str);
}
// do something with $str here...
$text = '<hr>I want to remove this text.<embed src="stuffinhere.html"/>';
$text = preg_replace('#(<hr>).*?(<embed.*?>)#', '$1$2', $text);
echo $text;
If you want to hard code src in embed tag:
$text = '<hr>I want to remove this text.<embed src="stuffinhere.html"/>';
$text = preg_replace('#(<hr>).*?(<embed src="stuffinhere.html"/>)#', '$1$2', $text);
echo $text;