hello i have been searching for some php code that is something like element.innerHTML in javascript but i can't find it. i need it for some code that for example goes from 1-60 in 60 seconds
but if i do that with echo it just places everything under each other and that should not happen. i need something that just replaces the text. i also don't want to reload my page every second and i don't have the ability to write to files ( i can read them). and please don't tell me that i should do it in javascript.
so can someone tell me how to do this?
You can use PHP to spit out javascript that does the replacing. There won't be a pure PHP solution to this since PHP is server-side and doesn't have access to the rendering of the page on the client side.
Suppose the text you need to change is in a <div> tag named 'replaceMe'. You will want to use the ob_flush() functions in PHP to force out the javascript at the time you need it to display. The PHP to initialize that is
if (ob_get_level() == 0) ob_start();
Then, each time you need to update, you have something like this in your PHP code that adds to the body of the page:
echo '<script type="text/javascript" language="javascript">';
echo "document.getElementById('replaceMe').innerHTML = 'Text for this iteration';";
echo '</script>';
flush(); ob_flush();
Of course if you want to make it easier for yourself, you can make a PHP function to print all this out given an argument containing the text to replace.
Then at the end you need to have
ob_end_flush();
to replace some text try str_replace http://de3.php.net/manual/de/function.str-replace.php
or case insensitive str_ireplace
Related
How would one go about showing PHP code on user end. Sort of like w3School does?
Having lets say a grey area div, and then showing the code in there without activating it?
You can use html entities <?php in the html it will be rendered as <?php
You can use htmlspecialchars to encode your code to use html entities.
Use <pre> or <code> tags to wrap your code.
Take a look at http://php.net/manual/en/function.highlight-string.php to further see how you can make the code look pretty.
Since passing a large block of code to highlight_string() can be messy, you may want to look at output buffering in combination with highlight_string to output colorized php code.
Something like:
<?php
ob_start();
?>
phpinfo();
echo "this echo statement isn't executed";
<?php
$code = ob_get_clean();
highlight_string($code);
?>
Simply you can use following code to display php code on webpage.
highlight_string("<?php print('This is php code.'); ?>");
It will give output like
<?php print('This is php code.'); ?>
The first step is to not wrap that code in PHP tags. So instead of this:
<?
var sample = "code";
?>
You would have this:
var sample = "code";
It's not the code itself which triggers the server-side compile from the PHP engine, it's the tags which indicate to that engine what blocks of the file are code and what are not. Anything that's not code is essentially treated as a string and output to the page as-is for the browser to interpret.
Once you're outputting the code, it's then a matter of formatting it. The old standard is to wrap it in pre tags to get rid of HTML-ish formatting:
<pre>
var sample = "code";
</pre>
You can also apply CSS style to the pre tags (or any other tags you want to use for displaying code, such as div) as you see fit.
There are also very useful code syntax highlighting plugins and tools to make the code a lot "prettier". Google-code-prettify often comes highly recommended.
Typically this is done by showing code within <pre> or <code> tags.
You can use this template........
######################################################################
echo "<h2><br>Source Code of ".basename((string)__FILE__) . "</h2><hr>";
show_source(__FILE__);
echo "<hr>";
echo "<h2>Output of ".basename((string)__FILE__) . "<hr></h2>";
#######################################################################
It will show the source code and output following.
use the header function of php, this will rea
<?php
header("content-type: text/plain");
?>
The PHP code will just be a string that you can echo or print onto the page, no different than any other data you want PHP to display for you. If you want to keep the formatting (ex. the indentation), put it inside a <pre><code> block.
Ex:
$php_code = '<?php $foo = bar; ?>';
echo "<pre><code>$php_code</code></pre>";
I have a php script that does a query in my database and returns a string ( like "2" ). I print it using
print strip_tags('2');
but in the output of my browser I get :
<body><html>2</html></body>
Is there any way to prevent the tags from beiing printed? Is it maybe that the browser auto adds them?
For all those answering about strip_tags (" 2 ");
THIS IS WRONG:
I want a siple version.php
with
echo '2';
and nothing else. It prints the tags too. I don't have the tags and then try to print.
More explanation to those who try to get easy rep
my code is:
$str = '2';
print strip_tags($str);
and it prints
<html><head></head><body>2</body></html>
It is not possible. The browser creates these elements automatically, without it there would not be any text flow(means nothing of this could be made visible). You can just use this variable for any script, it won't include the HTML tags. This is only made by the browser to make it visible for you.
You can use
header("Content-Type: text/plain");
at the beginning of your script, in order to tell the browsers you're only gonna send plain text, not html. This will prevent your browser from automatically adding those html tags.
Then, check what you print (or echo). Here, the body tag should be in html tag.
I'm quite new here. I'm trying to make a blog/journal site that allows users to post their own journal. I'm still quite reluctant on making it because I am really afraid of malicious code injections.
So here's a sample code:
<?php
$test = "<b>blah</b>"; //User input from SQL
echo "$test";
?>
What will come out is just the word "blah" in bold right? What I was trying to achieve was to echo "<b>blah</b>" instead. I don't want people to put some PHP codes that can actually mess up my whole web page. Please keep in mind that the variable $test is actually a MYSQL query, so that variable will be needed as an example. I know you can do echo '$test'; but it just comes out as "$test" instead. I feel like pulling my hair out I can't figure it out yet.
The second solution I know of is the htmlspecialchars(); function, but I want the strings to display as what I typed, not the converted ones...
Is there any way I can do that?
I think the OP wants the HTML itself to be output to the page, and not have the tags stripped. To achieve this, you can run the string first through htmlentities()
$test = '<b>blah</b>';
echo htmlentities($test);
This will output:
<b>blah</b>
Which will render in the page as
<b>blah</b>
Echo don't execute PHP code from string. This is impossible and this is not security hole in your code.
You can use a template engine like Twig for exemple.
If htmlspecialchars(); is not the one you are looking for, try the header() option.
header('Content-type: text/plain');
When you are gonna give <b>Hi</b> to a browser, it will be displayed in Bold and not the text be returned. But you can try this way, outputting it inside a <textarea></textarea>.
Or the other way is to use htmlentities():
<?php
$test = "<b>blah</b>"; //User input from SQL
echo htmlentities("$test");
?>
Is there any way to clear all html elements in a php page?
For example I have 100 html elements in my page, is there anyway to remove them?
As we know with javascript we have innerHTML but in PHP what?
clear all html elements in a php page
That doesn't make sense. HTML elements only exist in the DOM after PHP has executed and sent an HTML document to the browser. Server-side, where PHP executes, there are no elements to remove.
If you're trying to manipulate the HTML you've already output, you need to capture it with output buffering (see ob_start, ob_get_contents and ob_end_clean) but if your goal is to "clear all html elements", presumably so you can output a different set of elements, you simply need to not output anything in the first case. If this sounds like what you're trying to accomplish, you need to look into simple conditional statements like if/else.
as we know with javascript we have innerHTML but in php what ?
There is no PHP-equivalent because PHP doesn't have access to the client-side DOM. It is purely a server-side technology, and the output of your PHP script is the input to the browser. The DOM and its elements are generated long after your PHP script has executed. If you have an XHTML fragment in a string, and you want to parse/manipulate it, you can use xpath.
If your question is "clear html elements in a php file", the answer is: strip_tags().
$string = '<p>hello</p>';
echo strip_tags($string);
Try this:
<?php
if(//why you want to clear the elements){
echo "<script language=\"javascript\">";
?>
//Append all elements in <div id="body">
var body = document.getElementById("body");
body.innerHTML ="";
<?php
echo "</script>";
#Output your new element
echo "New elements.";
}
?>
Try this, it should definitely work.
<?php
echo "<script>document.write('');</script>";
?>
I have a code in my CMS that prints content:<?php print $content ?>
I would like to output the actual php and html code behind $content, ideally in the browser. What I mean here is not the result in the browser, but the actual code behind it.Is it possible at all?
EDIT: Just to explain further: I need to print the source code of $content. Basically this variable produce some html and php content. I would like to see the code it produces, change it and replace $content with my custom code. Ideally the source code should be printed in the browser, is there anny php function that does it?
First off install the Devel Module, it has a wonderful function called dpm() which will print the contents of any variable to the Drupal messages area.
Then you need to go into your theme's template.php file and implement hook_preprocess_page():
function mytheme_preprocess_page(&$vars) {
dpm($vars['content']);
}
That will print out the $content array before it's rendered into a string. In the same preprocess function you can also change $vars['content'] as you see fit, and the changes will be reflected in $content in page.tpl.php.
Hope that helps
What do you mean by 'the code'? I think what you want to do is not possible, unless you make some kind of quine it's not possible to output the actual php code of a php file when you run it.
If $content is something like:
$content = 3 + 4 + 5;
echo $content; will output 12 yes? But I'm taking it you want to output 3 + 4 + 5 or something along those lines. The thing is, PHP (although it doesn't feel like it) is compiled. In this trivial example, 3 + 4 + 5 is stored exactly nowhere in your compiled program, it is stored as 12 (since it's static). More complex lines of code will be stored as pointers, values etc., all in nicely obfuscated machine code. Getting back to the 3 + 4 + 5 requires reading the input file and outputting the relevant line, which is difficult (think about what happens if you add or remove some lines, or how your running program knows where in the source file it is, or even if it's in the right source file).
tl;dr: this is not possible.
Well, if you just want to see html source for $content, you should simply use htmlspecialchars :
echo htmlspecialchars($content);
http://php.net/htmlspecialchars
or http://php.net/htmlentities