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williankeller/amp-converter.php

Last active February 18, 2024 12:46
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Convert HTML to AMP
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amp-converter.php
<?php
class AMP {
private $html;
/**
* HtmlToAmp constructor.
*/
public function __construct($htmlContent) {
$this->html = $htmlContent;
}
public function convertedHTML() {
echo $this->ampify();
}
/**
*
*/
private function replaceTagsMain() {
// Replacing all img, audio, iframe, video elements to amp custom elements.
$this->html = str_ireplace(
['<html', 'https:', 'http:', '<img', '<video', '/video>', '<audio', '/audio>'], ['<html amp', '', '', '<amp-img', '<amp-video', '/amp-video>', '<amp-audio', '/amp-audio>'], $this->html
);
}
private function replaceHeaderMetas() {
// Content to replace header.
$this->html = preg_replace('/<(meta|link) ((charset|property|http-equiv)=|(name|rel)=[\\"](viewport|canonical)[\\"])(.*?)>/', '', $this->html);
}
private function replaceHeaderMain() {
// Content to replace header.
$this->html = preg_replace(
'/<head\/?>(.*)<\/head>/s', '<head>'
. '<meta charset="utf-8">'
. '<script async src="https://cdn.ampproject.org/v0.js"></script>'
. '$1'
. '</head>', $this->html);
}
private function replaceHeaderTags() {
// Content to replace header.
$this->html = preg_replace(
'/<head\/?>(.*)<\/head>/s', '<head>'
. '$1'
. '<link rel="canonical" href="$SOME_URL" />'
. '<meta name="viewport" content="width=device-width,minimum-scale=1">'
. '</head>', $this->html);
}
private function replaceHeaderStyles() {
// Content to replace header.
$this->html = preg_replace(
'/<head\/?>(.*?)<\/head>/s', '<head>'
. '$1'
. '<style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style>'
. '<noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>'
. '</head>', $this->html);
}
private function replaceBodyContent() {
// Adding amp-img closing tag.
$this->html = preg_replace('/<amp-img(.*?)\/?>/', '<amp-img layout="responsive"$1></amp-img>', $this->html);
}
protected function ampify() {
// Content to replace header.
$this->replaceHeaderMetas();
// Replacing all img, audio, iframe, video elements to amp custom elements.
$this->replaceTagsMain();
// Content to replace header.
$this->replaceHeaderMain();
// Content to replace header.
$this->replaceHeaderTags();
// Content to replace header.
$this->replaceHeaderStyles();
// Adding amp-img closing tag.
$this->replaceBodyContent();
return $this->html;
}
}
$html = file_get_contents('http://www.contentsuit.com');
$amp = new AMP($html);
$amp->convertedHTML();
@jagg1973
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Hello,
I am learning about converting to amp my static ste.
How do I use this tool?
Thanks

@williankeller
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Author

Hi, @jagg1973.
This is an automatic converter PHP-based. You have to have PHP running in order to use this tool.
You have an MVC using PHP you just have to call it within a controller.
if you have a static HTML website, you can run it manually, like that:

$html = file_get_contents('YOUR_WEBSITE_URL');

$amp = new AMP($html);

$amp->convertedHTML();

Change YOUR_WEBSITE_URL to your website URL.

@shoaiyb
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shoaiyb commented Jul 25, 2021

lang attribute and meta tags have been removed after the conversion.

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