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In this HTML JavaScript tutorial, Brijesh Shah guides you create some simple codes in Rails, JavaScript and PHP to strip HTML tags, strip tag PHP. Very simple and useful codes to try, you should check them. You can check our JavaScript Strip HTML Tags script.

Label: Rails, JavaScript, PHP, strip HTML tag, strip tag PHP

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Strip tag function is used to remove html tags from the string.

Here I will show you that how to use strip tag in ruby on rails, javascript and php.

#PHP:

Example 1: Remove all html tags.

<?php
$str '<h1>Test1.</h1><p> text2</p>';
echo strip_tags($str);
?>

Example 2: Allow p and h1 html tag.

<?php
$str '<h1>Test1.</h1><p> text2</p>';
echo strip_tags($str,"<h1><p>");
?>

#Ruby On Rails

Example 1: Remove all html tags

#model

class User < ActiveRecord::Base
include ActionView::Helpers
before_save :strip_comment
def strip_comment
return true if self.comment.nil?
self.comment=sanitize(self.comment,:tags =>%w())
save
return true
end

Example 2: Allow h1 and p html tags

#model

class User < ActiveRecord::Base
include ActionView::Helpers
before_save :strip_comment
 
def strip_comment
return true if self.comment.nil?
self.comment=sanitize(self.comment,:tags =>%w(p h1))
save
return true
end

#Javascript
#Add strip_tags.js

function strip_tags (str, allowed_tags) {
 
var key = '', allowed = false;
var matches = [];
var allowed_array = [];
var allowed_tag = '';
var i = 0;
var k = '';
var html = '';</pre>
var replacer = function (search, replace, str) {
return str.split(search).join(replace);
};
 
// Build allowes tags associative array
if (allowed_tags) {
allowed_array = allowed_tags.match(/([a-zA-Z0-9]+)/gi);
}
 
str += '';
 
// Match tags
matches = str.match(/(<\/?[\S][^>]*>)/gi);
 
// Go through all HTML tags
for (key in matches) {
if (isNaN(key)) {
// IE7 Hack
continue;
}
 
// Save HTML tag
html = matches[key].toString();
 
// Is tag not in allowed list? Remove from str!
allowed = false;
 
// Go through all allowed tags
for (k in allowed_array) {
// Init
allowed_tag = allowed_array[k];
i = -1;
 
if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+'>');}
if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+' ');}
if (i != 0) { i = html.toLowerCase().indexOf('</'+allowed_tag)   ;}
 
// Determine
if (i == 0) {
allowed = true;
break;
}
}
 
if (!allowed) {
str = replacer(html, "", str); // Custom replace. No regexing
}
}
 
return str;
 
}

#Used strip_tags function to remove html tags.
Example 1: remove all html tags.

1.var html_string= '<h1>Test1.</h1><p> text2</p>';
2.var strip_string= strip_tags(html_string);

Example 2: allow only p and h1 html tags

1.var html_string= '<h1>Test1.</h1><p> text2</p>';
2.var strip_string= strip_tags(html_string,"<p><h1>");

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18/11/2010
Brijesh Shah [more]
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Strip HTML tags in Rails, JavaScript and PHP - Language: English

5/5 1 votes / 26,905 previews / 0 comment 18/11/2010 In this HTML JavaScript tutorial, Brijesh Shah guides you create some simple codes in Rails, JavaScript and PHP t...Strip HTML tags in Rails, JavaScript and PHP - Strip HTML tags in Rails, JavaScript and PHP - Language: English

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