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
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 like bellow:
<pre title="language-markup">
<code>
<div title="item_content item_view_content" itemprop="articleBody">
abc
</div>
</code>
</pre>
In the <code></code> tag I want to replace all the characters < and > with < and >. How should I do?
Example: <code> < div ><code>.
Please tell me if you have any ideas. Thanks all.
try below solution:
$textToScan = '<pre title="language-markup">
<code>
<div title="item_content item_view_content" itemprop="articleBody">
abc
</div>
</code>
</pre>';
// the regex pattern (case insensitive & multiline
$search = "~<code>(.*?)</code>~is";
// first look for all CODE tags and their content
preg_match_all($search, $textToScan, $matches);
//print_r($matches);
// now replace all the CODE tags and their content with a htmlspecialchars() content
foreach($matches[1] as $match){
$replace = htmlspecialchars($match);
// now replace the previously found CODE block
$textToScan = str_replace($match, $replace, $textToScan);
}
// output result
echo $textToScan;
output:
<pre title="language-markup">
<code>
<div title="item_content item_view_content" itemprop="articleBody">
abc
</div>
</code>
</pre>
Don't. Use htmlspecialchars. That is there only to serve that very purpose
echo htmlspecialchars("<a href='test'>Test</a>");
Output of your HTML code
<pre title="language-markup"><code>
<div title="item_content item_view_content"
itemprop="articleBody">abc</div></code></pre>
Another example based on your comment
<code>
<?php
echo htmlspecialchars('html here');?>
</code>
Use either htmlspecialchars() or htmlentities()
$string = "<html></html>"
// Do this
$encodedString = htmlentities($string);
// or
$encodedString = htmlspecialchars($string);
The difference in these two functions is that one will encode everything or better said "entities". The other will only encode special characters.
Below are some quotes from PHP.net
From the PHP documentation for htmlentities:
This function is identical to htmlspecialchars() in all ways, except with htmlentities(), all characters which have HTML character entity equivalents are translated into these entities.
From the PHP documentation for htmlspecialchars:
Certain characters have special significance in HTML, and should be represented by HTML entities if they are to preserve their meanings. This function returns a string with some of these conversions made; the translations made are those most useful for everyday web programming. If you require all HTML character entities to be translated, use htmlentities() instead.
Ok, I'm trying to fix my problem. I was successed, this is my code to resolve my problem. You can use my way or use Chetan Ameta's way bellow my answer:
function replaceString($string)
{
preg_match_all('/<code>(.*?)<\/code>/', $string, $matches);
$result = [];
foreach ($matches[1] as $key => $match) {
$result[$key] = str_replace(['<', '>'], ['<', '>'], $match);
}
return str_replace($matches[1], $result, $string);
}
$string = '<pre title="language-markup"><code><div title="item_content item_view_content" itemprop="articleBody">abc</div></code></pre>';
echo replaceString($string);
I like this place, thanks all help me, i'm so grateful. Thank again.
I need to perform a recursive str_replace on a portion of HTML (with recursive I mean inner nodes first), so I wrote:
$str = //get HTML;
$pttOpen = '(\w+) *([^<]{1,100}?)';
$pttClose = '\w+';
$pttHtml = '(?:(?!(?:<x-)).+)';
while (preg_match("%<x-(?:$pttOpen)>($pttHtml)*</x-($pttClose)>%m", $str, $match)) {
list($outerHtml, $open, $attributes, $innerHtml, $close) = $match;
$newHtml = //some work....
str_replace($outerHtml, $newHtml, $str);
}
The idea is to first replace non-nested x-tags.
But it only works if innerHtml in on the same line of the opening tag (so I guess I misunderstood what the /m modifier does). I don't want to use a DOM library, because I just need simple string replacement. Any help?
Try this regex:
%<x-(?P<open>\w+)\s*(?P<attributes>[^>]*)>(?P<innerHtml>.*)</x-(?P=open)>%s
Demo
http://regex101.com/r/nA2zO5
Sample code
$str = // get HTML
$pattern = '%<x-(?P<open>\w+)\s*(?P<attributes>[^>]*)>(?P<innerHtml>.*)</x-(?P=open)>%s';
while (preg_match($pattern, $str, $matches)) {
$newHtml = sprintf('<ns:%1$s>%2$s</ns:%1$s>', $matches['open'], $matches['innerHtml']);
$str = str_replace($matches[0], $newHtml, $str);
}
echo htmlspecialchars($str);
Output
Initially, $str contained this text:
<x-foo>
sdfgsdfgsd
<x-bar>
sdfgsdfg
</x-bar>
<x-baz attr1='5'>
sdfgsdfg
</x-baz>
sdfgsdfgs
</x-foo>
It ends up with:
<ns:foo>
sdfgsdfgsd
<ns:bar>
sdfgsdfg
</ns:bar>
<ns:baz>
sdfgsdfg
</ns:baz>
sdfgsdfgs
</ns:foo>
Since, I didn't know what work is done on $newHtml, I mimic this work somehow by replacing x-with ns: and removing any attributes.
Thanks to #Alex I came up with this:
%<x-(?P<open>\w+)\s*(?P<attributes>[^>]*?)>(?P<innerHtml>((?!<x-).)*)</x-(?P=open)>%is
Without the ((?!<x-).)*) in the innerHtml pattern it won't work with nested tags (it will first match outer ones, which isn't what I wanted). This way innermost ones are matched first. Hope this helps.
I don't know exactly what kind of changes you are trying to do, however this is the way I will proceed:
$pattern = <<<'EOD'
~
<x-(?<tagName>\w++) (?<attributes>[^>]*+) >
(?<content>(?>[^<]++|<(?!/?x-))*) #by far more efficient than (?:(?!</?x-).)*
</x-\g<tagName>>
~x
EOD;
function callback($m) { // exemple function
return '<n-' . $m['tagName'] . $m['attributes'] . '>' . $m['content']
. '</n-' . $m['tagName'] . '>';
};
do {
$code = preg_replace_callback($pattern, 'callback', $code, -1, $count);
} while ($count);
echo htmlspecialchars(print_r($code, true));
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);
}
I have seen some solutions, or at least tries, but none of them really work.
How do I strip all tags except those inside <code> or [code] - and replace all the < and > with < etc. in order to let JavaScript do some syntax highlighting on the output?
Why don't you try using strpos() to get the position of [code] and [/code].
When you have the location (assuming you only have one set of the code tag) just get the contents of everything before and everything after and the strip_tags on that text.
Hope this helps.
Use a callback:
$code = 'code: <p>[code]<hi>sss</hi>[/code]</p> more code: <p>[code]<b>sadf</b>[/code]</p>';
function codeFormat($matches)
{
return htmlspecialchars($matches[0]);
}
echo preg_replace_callback('#\[code\](?:(?!\[/code\]).)*\[/code\]#', 'codeFormat', $code);
<?php
$str = '<b><code><b><a></a></b></code></b><code>asdsadas</code>';
$str = str_replace('[code]', '<code>', $str);
$str = str_replace('[/code]', '</code>', $str);
preg_match('/<code>(.*?)<\/code>/', $str, $matches);
$str = strip_tags($str, "<code>");
foreach($matches as $match)
{
$str = preg_replace('/<code><\/code>/', $str, '<code>'.htmlspecialchars($match).'</code>', 1);
}
echo $str;
?>
This searches for the code tags and captures what is within the tags. Strips the tags. Loops through the matches replacing the code tags with the text captured and replacing the < and >.
EDIT: the two str_replace lines added to allow [code] too.
$str = '[code]
<script type="text/javascript" charset="utf-8">
var foo = "bar";
</script>
[/code]
strip me';
echo formatForDisplay( $str );
function formatForDisplay( $output ){
$output = preg_replace_callback( '#\[code]((?:[^[]|\[(?!/?code])|(?R))+)\[/code]#', 'replaceWithValues', $output );
return strip_tags($output);
}
function replaceWithValues( $matches ){
return htmlentities( $matches[ 1 ] );
}
try this should work, i tested it and it seemed to have the desired effect.
Well, I tried a lot with all your given code, right now I am working with this one, but it is still not giving the expected results -
What I want is, a regular textarea, where one can put regular text, hit enter, having a new line, not allowing tags here - maybe <strong> or <b>....
Perfect would be to recognice links and have them surrounded with <a> tags
This text should automatically have <p> and <br /> where needed.
To fill in code in various languages one should type
[code lang=xxx] code [/code] - in the best case [code lang="xxx"] or <code lang=xxx> would work too.
Than typing the code or copy and paste it inside.
The code I am using at the moment, that at least does the changing of tags and output it allright except of tabs and linebreaks is:
public function formatForDisplay( $output ){
$output = preg_replace_callback( '#\[code lang=(php|js|css|html)]((?:[^[]|\[(?!/?code])|(?R))+)\[/code]#', array($this,'replaceWithValues'), $output );
return strip_tags($output,'<code>');
}
public function replaceWithValues( $matches ){
return '<code class="'.$matches[ 1 ].'">'.htmlentities( $matches[ 2 ] ).'</code>';
}
Similar like it works here.
The strip_tag syntax gives you an option to determine the allowable tags:
string strip_tags ( string $str [, string $allowable_tags ] ) -> from PHP manual.
This should give you a start on the right direction I hope.