How to minify php html output without removing non empty newlines?

问题

How to minify my php page html output like google page speed does?

Example:

<!DOCTYPE html>
<html>

<head>
<title>Untitled Document</title>

<meta name="description" content="Phasellus rhoncus euismod libero a lacinia. Lorem ipsum dolor sit amet, consectetur adipiscing elit." />

</head>

<body>
<div id="content">
<div id="post-1">
<h1>Phasellus rhoncus euismod libero a lacinia.</h1>
<p>...</p>
</div>

<div id="post-2">
<h1>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</h1>
<p>...</p>
</div>

</div>


</body>
</html>

How can this html output can become something like this using php ob_start?

<!DOCTYPE html>
<html>
<head>
<title>Untitled Document</title> 
<meta name="description" content="Phasellus rhoncus euismod libero a lacinia. Lorem ipsum dolor sit amet, consectetur adipiscing elit." />
</head>
<body>
<div id="content">
<div id="post-1">
<h1>Phasellus rhoncus euismod libero a lacinia.</h1>
<p>...</p>
</div>
<div id="post-2">
<h1>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</h1>
<p>...</p>
</div>
</div>
</body>
</html>

EDIT:

I've tried this code (based on James Pegg's answer)

function sanitize_output($buffer){
$search = array("\n", "\t");
return preg_replace($search, '', $buffer);}

ob_start("sanitize_output");

But it doesn't work. The page is now empty.

Final working code (based on W. Kristianto's answer):

function sanitize_output($buffer){
$buffer = preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $buffer);
return $buffer;}

回答1:

$data = '
<!DOCTYPE html>
<html>

<head>
<title>Untitled Document</title>

<meta name="description" content="Phasellus rhoncus euismod libero a lacinia. Lorem ipsum dolor sit amet, consectetur adipiscing elit." />

</head>

<body>
<div id="content">
<div id="post-1">
<h1>Phasellus rhoncus euismod libero a lacinia.</h1>
<p>...</p>
</div>

<div id="post-2">
<h1>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</h1>
<p>...</p>
</div>

</div>


</body>
</html>';

echo "<pre>";
echo htmlentities(preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $data));
echo "</pre>";

回答2:

Just remove every line which contains only \r\n, or \r, or \n.

This can be useful: How do I remove blank lines from text in PHP?

回答3:

You could take out all new lines and tabs like this:

<?php
// Start Output Bugger
ob_start();

// Start HTML Output
?>
<!DOCTYPE html>
<html>

<head>
<title>Untitled Document</title>

<meta name="description" content="Phasellus rhoncus euismod libero a lacinia. Lorem ipsum dolor sit amet, consectetur adipiscing elit." />

</head>

<body>
<div id="content">
<div id="post-1">
<h1>Phasellus rhoncus euismod libero a lacinia.</h1>
<p>...</p>
</div>

<div id="post-2">
<h1>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</h1>
<p>...</p>
</div>

</div>


</body>
</html>

<?php

// Save Output bugger as a variable
$html = ob_get_clean();

//Array of characters to replace
$strings = Array("\n", "\t");

//Strip out new lines and tabs
$html = str_replace($strings, '', $html);

//Echo minified content
echo $html;
?>

Hope that helps!

回答4:

Try to use some js library, some times its useful

来源：https://stackoverflow.com/questions/12902745/how-to-minify-php-html-output-without-removing-non-empty-newlines

标签

php

html

minify