Okay, so maybr I'm going about doing this entirely wrong, I probably am. But I would like to be able to take the HTML between a ... like so:
$str = ?>
... some HTML goes here ...
<?php ;
Am I completely off my rocker to think I can do this? I couldn't think of a way to put it into words so I could search it on Google, which is why I'm here...
You can use output buffering:
ob_start();
?>
... some HTML goes here ...
<?php
echo 'php outputs are captured too';
$str = ob_get_contents();
ob_end_clean();
Alternatively, if it's just a little bit of HTML (and no php code within), just write it down with one of the string formats like heredoc or nowdoc:
$str = <<<'NOWDOC'
... some HTML goes here
NOWDOC;
Look into heredocs and nowdocs. A heredoc looks like:
$str = <<<HTML
<div>This is some text!</div>
HTML;
// We're back in PHP.
echo $str;
If you specifically want to work with HTML, look into XHP.
Just wanted to add to phihag's answer.
It is possible to capture HTML with a function as well, including with anonymous functions:
<?php $bob = function() { ?>
... some HTML here...
<?php }; ?>
and later output $bob:
<?php $bob(); ?>
or capture the output of $bob somewhere else with output buffering:
ob_start();
$bob();
$str = ob_get_contents();
ob_end_clean();
PHP has a multiline, specially delimited string for such situations.
This talks about it a little.
Related
<?php echo $row["html"]; ?>
Inside of the $row["html"] there's:
<?php $Site->Nav($owner); ?>
but when I echo it, it only echoes:
Nav($owner); ?>
How may I print the full and make it usable, which means that it will print the function Nav?
I've tried to replace <?php with [[// i the database, and just before echoing it, I change back with replace. But without success
I think you need to use eval function of php. See the example below.
$string = 'cup';
$name = 'coffee';
$str = 'This is a $string with my $name in it.';
echo $str. "\n";
eval("\$str = \"$str\";");
echo $str. "\n";
Might be it can help.
Use eval function. It might solve your problem like this:
<?php echo eval($row["html"]); ?>
Keep the code as is in DB as if you are writing it in PHP file but without PHP opening and closing tags i.e. <?php and ?>. I haven't checked this (as i am not sure what $Site->Nav($owner); will do) but hope it would work in this case.
If I understand correctly you are wanting to output the results of $Site->Nav($owner);
I have no idea what this is expected to output, but assuming it is a string of some kind that you wish to display (hence echo) - an example of achieving this would be calling your code and have that method return the value, so you can echo it out. Ie:
function Nav($owner){
// Do your stuff
return 'Your Desired Output';
}
Then on your page you would have
<?php echo $Site->Nav($owner); ?>
Which would echo "Your Desired Output".
I recently looked at my source code and it was a real mess.
my php source:
echo '<h1>Rar<h1>';
echo '<span>Rar</span>';
echo '<p>Rar</p>';
and when I view the browser source for the page rendered:
<h1>Rar</h1><span>Rar</span><p>Rar</p>
is there a way for me to override echo so that every output would end with a newline, something like
function echo($string)
{
echo $string . "\r\n";
}
echo is not a function, but a language statement. It cannot be redefined. If you are looking to prettify your output markup, have look at Tidy.
What you could do, is use your IDE's search/replace method and replace all echo statements with echo PHP_EOL,. This would append the OS specific newline char(s) before any output. Note the comma after PHP_EOL as it is important.
You can output several values with echo like this:
echo 'one', $foo, PHP_EOL,
'two', $bar, PHP_EOL;
so there is no need to write echo on each line.
However, I agree with anyone who suggested using a more dedicated approach to separate content and layout e.g. using template views or HereDoc.
In additon, there is very little gain in having pretty markup. If you are using tools like Firebug to inspect the HTML, you will have properly formatted markup regardless of the mess the markup really is. Moreover, on sites with a lot of visitors, you'll often find the markup minified, which is the opposite of what you are trying to do, simply because all these newlines and tabs add to the weight of the page, which leads to slower page loads and increased traffic cost.
You have various possibilities to output HTML.
You can use the heredoc syntax:
$html = <<<EOF
<h1>Rar<h1>
<span>Rar</span>
<p>Rar</p>
EOF
echo $hml;
Or (what is way better in my opinion), separate HTML from PHP. E.g. put all the PHP logic in the top of the file and the HTML after the PHP block:
<?php
// all your PHP goes here
$foo = 'bar'
?>
<!-- HTML comes here -->
<html>
<body>
<div>Hello <?php echo $foo; ?> </div>
</body>
</html>
Variables can be printed as shown above. But these variables don't contain HTML.
When you have to output HTML based on a condition, you can use the alternative syntax for control statements:
<?php if($some_condition): ?>
<h1>Rar<h1>
<span>Rar</span>
<p>Rar</p>
<?php endif ?>
This way it is also easier to debug your HTML as it is not only a PHP string.
You can set up and output buffer and then run the buffer through htmltidy. The tidy extension even has a specific function for the purpose. Just call this before you start outputting your html:
ob_start('ob_tidyhandler');
Although this solution does not override echo, you can get something close to echo with a newline. Add:
function e() {
return o::singleton();
}
class o {
private static $instance;
public static function singleton()
{
if (!isset(self::$instance)) {
$className = __CLASS__;
self::$instance = new $className;
}
return self::$instance;
}
public function __set($prop, $txt) {
echo $txt . PHP_EOL;
}
}
to your file, and then you can use:
e()->o = "Line which ends in newline";
instead of echo.
Another solution would be to separate your code from your layouts by using a proper templating engine.
You can indirectly overload echo() by using the __toString() magic method like so:
<?php
class CleanOutput
{
public $content;
public function __construct($c) {
$this->content= $c;
}
public function __toString() {
return $this->content . '\r\n';
}
}
$text= new CleanOutput('Hello world!');
echo $text;
?>
The above would output "Hello world!" with a newline and carriage return appended at the end. There's ways to further encapsulate this, but they are outside the scope of my answer.
Edit:
As was noted, the above solution is slow/clumsy. Here's a more elegant solution using output buffering:
<?
function clean_up($foo) {
return $foo . '\r\n';
}
ob_start('clean_up');
ob_implicit_flush(true);
echo "Hello world!";
?>
This is faster and cleaner (although it technically doesn't 'override' echo).
I have got a Html and Javascript code, that contains about 1000 lines and I need to put it to php variable.
Sure I was thinking about the EOT method, But there is one problem with it, if there is word function like in javascript is, it will take it like php function, and this will cause errors.
Any other Idea how to do it?
I have already tried other forums, but they can't help me, so I hope they can help me on the best.
Maybe use output buffering...
<?php
ob_start();
?>
<b>
<u>
<font color="#FF0000">
<blink>
<marquee>
1000
LINES
OF
HTML
AND
JAVASCRIPT!
</marquee>
</blink>
</font>
</u>
</b>
<?php
$content = ob_get_contents();
ob_clean();
?>
Then your HTML and JavaScript will be in the $content variable.
You could read directly from an HTML file on disk, using file_get_contents().
You can use the EOF method.
There's no problem with reserved words in that case. (As far as I know)
EDIT:
$output .= <<<HTML
function bla()
{
//Something
}
HTML;
Won't be treated as a php function.
Try this;
class Temp
{
public function html($path)
{
ob_start()
require(path); // or file_get_contents(<URI>);
$html = ob_get_clean ();
return $html
}
}
$temp = new Temp();
$htmlData = $temp->html('somepath/somefile.php')
echo $htmlData;
I want to be able to put PHP into the database and run it. I have to do this because I store page layouts in the database and each our different for each other, however in some cases I want to use dynamic content for some of the pages.
Assume $query_from_db is the string returned from the database. PHP should only eval() the code in between <?php and ?>
$query_from_db = '<div>
<?php
//php to run
function dosomething() {
//bleh
}
?>
</div>
';
php echo eval($query_from_db);
How can I do this? I'm aware this is not recommended.
I'm not arguing about the sense or nonsense of this approach. To some extend, this is a valid question.
See the documentation:
To mix HTML output and PHP code you can use a closing PHP tag to leave PHP mode.
So you have to do:
eval('?> ' . $query_from_db . ' <?php ');
DEMO
Also note that eval is outputting directly to the browser. It does not return a value. Have a look at Output Control Functions for buffering.
You are aware that this is not recommended and I strongly urge everyone to review the comments to this question.
But to provide an answer:
<?php
$string = 'hello <?php echo "world"; ?>';
eval('?>'.$string.'<?'); // will output "hello world";
be aware that this however will not work:
<?php
$string = 'hello <?php echo "world"; ?>';
eval('?>'.$string.'<?php'); // error will be thown
This works again:
<?php
$string = 'hello <?php echo "world"; ?>';
eval('?> '.$string.' <?php '); // will output "hello world";
i am not really sure why.
following up on your comment to grab the output you can do:
<?php
$string = 'hello <?php echo "world"; ?>';
ob_start();
eval('?> '.$string.' <?php '); // will output "hello world";
$output = ob_get_clean(); // $output will now contain "hello world". No text will have ben printed.
If you want to avoid the eval stigmata, you can alternatively use:
include("data:,$query_from_db");
It's just another name for eval which doesn't upset people as much. It depends on the php.ini setting allow_url_include however.
What you are doing is functionally equivalent to include("$template/$by_name.php"); and just differs in that you didn't put the database content into a file before. (But that's the other workaround: file_put_contents && include).
I am generating a lot of HTML code via PHP, but I need to store it in a variable, not display it immediately. But I want to be able to break out of PHP so my code isnt a giant string.
for example (but actual code will be much larger):
<?php
$content = '<div>
<span>text</span>
link
</div>';
?>
I want to do something like this:
<?php
$content =
?>
<div>
<span>text</span>
link
</div>
<?php
;
?>
But I know this will not return the html as a value it will just print it to the document.
But is there a way to do this tho?
Thanks!
You can use output buffering:
<?php
ob_start();
?>
<div>
<span>text</span>
link
</div>
<?php
$content = ob_get_clean();
?>
Or a slightly different method is HEREDOC syntax:
<?php
$content = <<<EOT
<div>
<span>text</span>
link
</div>
EOT;
?>
Try this:
<?php
$var = <<<EOD
my long string
EOD;
echo $var;
?>
(edit done, but one has edit faster than me :))
In my opinion, you should look into a template engine such as Smarty. It can help you take some of the ugliness out of hardcoding HTML into the PHP file, and can help make the code more manageable.
You could store the html in an html file and read that file into a variable.
While still technically a string, you might find the documentation on PHP's heredoc to be an entertaining read:
heredoc syntax
$content = <<<EOT
<div>
<span>text</span>
link
</div>
EOT;
Use heredoc syntax.