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HTML into PHP Variable (HTML outside PHP code)
(7 answers)
Closed 4 years ago.
Hi i'd like to store a dinamically generated(with php) html code into a variable and be able to send it as a reply to an ajax request.
Let's say i randomly generate a table like:
<?php
$c=count($services);
?>
<table>
<?php
for($i=0; $i<$c; $i++){
echo "<tr>";
echo "<td>".$services_global[$i][service] ."</td>";
echo "<td>".$services_global[$i][amount]."</td>";
echo "<td>€ ".$services_global[$i][unit_price].",00</td>";
echo "<td>€ ".$services_global[$i][service_price].",00</td>";
echo "<td>".$services_global[$i][service_vat].",00%</td>";
echo "</tr>";
}
?>
</table>
I need to store all the generated html code(and the rest) and echo it as a json encoded variable like:
$error='none';
$result = array('teh_html' => $html, 'error' => $error);
$result_json = json_encode($result);
echo $result_json;
I could maybe generate an html file and then read it with:
ob_start();
//all my php generation code and stuff
file_put_contents('./tmp/invoice.html', ob_get_contents());
$html = file_get_contents('./tmp/invoice.html');
But it sounds just wrong and since i don't really need to generate the code but only send it to my main page as a reply to an ajax request it would be a waste of resources.
Any suggestions?
You don't have to store it in a file, you can just use the proper output buffering function
// turn output buffering on
ob_start();
// normal output
echo "<h1>hello world!</h1>";
// store buffer to variable and turn output buffering offer
$html = ob_get_clean();
// recall the buffered content
echo $html; //=> <h1>hello world!</h1>
More about ob_get_clean()
if the data is so much expensive to regenerate then I would suggest you to use memcached.
Otherwise I would go regenerate it every-time or cache it on the frontend.
for($i=0;$i<=5;$i++)
{
ob_start();
$store_var = $store_var.getdata($i); // put here your recursive function name
ob_get_clean();
}
function getdata($i)
{
?>
<h1>
<?php
echo $i;
?>
</h1>
<?php
ob_get_contents();
}
Related
how to check if text is present on a webpage using php and if true to execute some code?
My idea is to show some relevant products on the confirmation page after completing an order - if the name of the product is present on the page, then load some products. But I can't make the check for present text.
Case 1 if you prepare your page in a variable then echo it at the end of the script like
$response = "<html><body>";
$response .= "<div>contents text_to_find</div>";
$response .= "</body></html>";
echo $response;
then you can merely search the string with any string search function
if(strpos($response,"text_to_find") !==false){
//the page has the text , do what you want
}
Case 2 if you don't prepare the page in a string . and you just echo the contents and output the contents outside the <?php ?> tags like
<?php
//php stuff
?>
<HTML>
<body>
<?php
echo "<div>contents text_to_find</div>"
?>
</body>
</HTML>
Then you have no way to catch the text you want unless you use output buffering
Case 3 if you use output buffering - which I suggest - like
<?php
ob_start();
//php stuff
?>
<HTML>
<body>
<?php
echo "<div>contents text_to_find</div>"
?>
</body>
</HTML>
then you can search the output anytime you want
$response = ob_get_contents()
if(strpos($response,"text_to_find") !==false){
//the page has the text , do what you want
}
You may need to buffer your Output like so...
<?php
ob_start();
// ALL YOUR CODE HERE...
$output = ob_get_clean();
// CHECK FOR THE TEXT WITHIN THE $output.
if(stristr($output, $text)){
// LOGIC TO SHOW PRODUCTS WITH $text IN IT...
}
// FINAL RENDER:
echo $output;
Fastest solution is using php DOM parser:
$html = file_get_contents('http://domain.com/etc-etc-etc');
$dom = new DOMDocument;
$dom->loadHTML($html);
$divs = $dom->getElementsByTagName('div');
$txt = '';
foreach ($divs as $div) {
$txt .= $div->textContent;
}
This way, variable $txt would hold the text content of a given webpage, as long as it is enclosed around div tags, as usually. Good luck!
This block of PHP code prints out some information from a file in the directory, but I want the information printed out by echo to be used inside the HTML below it. Any help how to do this? Am I even asking this question right? Thanks.
if(array_pop($words) == "fulltrajectory.xyz") {
$DIR = explode("/",htmlspecialchars($_GET["name"]));
$truncatedDIR = array_pop($DIR);
$truncatedDIR2 = ''.implode("/",$DIR);
$conffile = fopen("/var/www/scmods/fileviewer/".$truncatedDIR2."/conf.txt",'r');
$line = trim(fgets($conffile));
while(!feof($conffile)) {
$words = preg_split('/\s+/',$line);
if(strcmp($words[0],"FROZENATOMS") == 0) {
print_r($words);
$frozen = implode(",", array_slice(preg_split('/\s+/',$line), 1));
}
$line = trim(fgets($conffile));
}
echo $frozen . "<br>";
}
?>
The above code prints out some information using an echo. The information printed out in that echo I want in the HTML code below where it has $PRINTHERE. How do I get it to do that? Thanks.
$("#btns").html(Jmol.jmolButton(jmolApplet0, "select atomno=[$PRINTHERE]; halos on;", "frozen on")
You just need to make sure that your file is a php file..
Then you can use html tags with php scripts, no need to add it using JS.
It's as simple as this:
<div>
<?php echo $PRINTHERE; ?>
</div>
Do remember that PHP is server-side and JS is client-side. But if you really want to do that, you can pass a php variable like this:
<script>
var print = <?php echo $PRINTHERE; ?>;
$("#btns").html(Jmol.jmolButton(jmolApplet0, "select atomno="+print+"; halos on;", "frozen on"));
</script>
How do you append something to the beginning of the output buffer?
For example, say you have the following code:
ob_start();
echo '<p>Start of page.</p>';
echo '<p>Middle of page.</p>';
echo '<p>End of page</p>';
Before flushing the contents to the browser, how can I append something so that it appears before <p>Start of page.</p> when the page loads?
It sounds simple enough, like moving the pointer to the beginning of an array, but I couldn't find how to do it with the output buffer.
** PHP 5.3 **
ob_start(function($output) {
$output = '<p>Prepended</p>'.$output;
return $output;
});
echo '<p>Start of page.</p>';
echo '<p>Middle of page.</p>';
echo '<p>End of page</p>';
** PHP < 5.3 **
function prependOutput($output) {
$output = '<p>Appended</p>'.$output;
return $output;
}
ob_start('prependOutput');
echo '<p>Start of page.</p>';
echo '<p>Middle of page.</p>';
echo '<p>End of page</p>';
Use 2 ob_start commands and ob_end_flush() after what you want to first display then end the buffer with ob_end_flush again when you want to output the rest of the page.
eg:
ob_start();
ob_start();
echo '<p>Start of page.</p>';
ob_end_flush();
echo '<p>Middle of page.</p>';
echo '<p>End of page</p>';
ob_end_flush();
You can get content of buffer using ob_get_contents() function
ob_start();
echo "World! ";
$out1 = ob_get_contents();
echo "Hello, ".$out1;
Are you wanting it before any output at all? If so, then you're looking for the auto_prepend_file directive. http://php.net/manual/en/ini.core.php
See the first parameter of ob_start (documentation here), it allows you to provide a callback to be called when the buffer is flushed or cleaned. It receives a string as a parameter and outputs a string, therefore it should be easy to
function writeCallback($buffer)
{
return "Added before " . $buffer;
}
ob_start("writeCallback");
$content = file_get_contents('file.php');
echo $content;
nothing displays, expect when displaying the page sourcecode in browser the display is this
<? foreach(glob("folder/*.php") as $class_filename) { require_once($class_filename); } ?>
so it wont execute the script when getting the content..
file.php contains this code
<? foreach(glob("folder/*.php") as $class_filename) {
require_once($class_filename);
}
?>
and if I do next
$content = foreach(glob("folder/*.php") as $class_filename) { require_once($class_filename); } ?>
it complains about unexpected foreach...
is there a way to read the folder/.php files content to single $variable and then echo/print all folder/.php files to page where it should be?
thanks for help already.
Is that what you want to do ?
$content = '';
foreach (glob('folder/*.php') as $class){$content .= file_get_contents($class);}
echo $content;
What you're trying won't execute the contents of the "file.php", jsut display the contents of them on screen.
If you want to execute file.php, use eval ($content)
To capture the output, use something like:
ob_start(); // Don't echo anything but buffer it up
$codeToRun=file_get_contents('file.php'); // Get the contents of file.php
eval ($codeToRun); // Run the contents of file.php
$content=ob_get_flush(); // Dump anything that should have been echoed to a variable and stop buffering
echo $content; //echo the stuff that should have been echoed above
I have a php function that generates HTML code like below
function j_uf_SomeFunction($some_var) {
?><div class="db_photo">
<img alt="<?php echo some_php_function ?>" src="<?php echo $some_var; ?>" />
</div><?php
}
Of course, its much more advanced and add all sorts of user options.
In most case I place this function inline, as opposed to have to append it to a string. However, I've come to the first occurrence (probably not the last occurrence) where I need to store the rendered HTML in a string and not have it sent straight off to the parser for building the page.
I need to cut the function off and tell it to take the html generated and store it in a string, and not send it off to the page, only on certain situations.
function j_uf_SomeFunction($some_var) {
ob_start();
?><div class="db_photo">
<img alt="<?php echo some_php_function ?>" src="<?php echo $some_var; ?>" />
</div><?php
return ob_get_clean();//suggestion by GWW
}
ob_start() is starting buffer receive
ob_get_clean() cleans current buffer and returns its value.
More info on http://php.net/manual/en/function.ob-start.php
ob * output buffering
It sounds like output buffers are one possible solution to your problem.
You use an output buffer like so:
ob_start();
j_uf_SomeFunction($someVar);
$buffer = ob_get_contents();
ob_end_clean();
The $buffer variable now contains anything printed out by the function.
It's important to always close output buffers with ob_end_clean or ob_end_flush. You can read more here: http://php.net/manual/en/book.outcontrol.php
Regards,
Chris
I don't I have a template system to parse this functions value into... its not your standard function call.
sure you do... its jsut contained within the function :-)
using translation:
function j_uf_SomeFunction($some_var) {
$html = "<div class="db_photo"><img alt="%some_function_result%" src="%some_var%" /></div>";
$tokens = array(
'%some_var%' => $some_var,
'%some_function_call_result%' => some_function_call()
);
return strtr($html, $tokens); // or echo
}
using string manipulation:
function j_uf_SomeFunction($some_var) {
$html = '<div class="db_photo"><img alt="%s" src="%s" /></div>';
return sprintf($html, some_function_call(), $some_var); //or echo
}
if some_function_call actually outputs html directly with its own echo then jsut use a buffer:
function j_uf_SomeFunction($some_var) {
ob_start();
some_function_call();
$somefunc = ob_get_clean();
$html = '<div class="db_photo"><img alt="%s" src="%s" /></div>';
return sprintf($html, $somefunc, $some_var); //or echo
}