try-amp-sanitizing-script.php

<?php

$scripts = array();
$styles = array();

$content = 'I am <script>not</script> evil.';
$global_args = array();

if ( ! class_exists( 'AMP_DOM_Utils' ) ) {
	amp_load_classes();
}
$dom = AMP_DOM_Utils::get_dom_from_content( $content );

$sanitizer_classes = apply_filters( 'amp_content_sanitizers', array(
	'AMP_Style_Sanitizer' => array(),
	'AMP_Img_Sanitizer' => array(),
	'AMP_Video_Sanitizer' => array(),
	'AMP_Audio_Sanitizer' => array(),
	'AMP_Playbuzz_Sanitizer' => array(),
	'AMP_Iframe_Sanitizer' => array(
		'add_placeholder' => true,
	),
	'AMP_Tag_And_Attribute_Sanitizer' => array(),
) );

foreach ( $sanitizer_classes as $sanitizer_class => $args ) {
	if ( ! class_exists( $sanitizer_class ) ) {
		_doing_it_wrong( __METHOD__, sprintf( esc_html__( 'Sanitizer (%s) class does not exist', 'amp' ), esc_html( $sanitizer_class ) ), '0.4.1' );
		continue;
	}

	$sanitizer = new $sanitizer_class( $dom, array_merge( $global_args, $args ) );

	if ( ! is_subclass_of( $sanitizer, 'AMP_Base_Sanitizer' ) ) {
		_doing_it_wrong( __METHOD__, sprintf( esc_html__( 'Sanitizer (%s) must extend `AMP_Base_Sanitizer`', 'amp' ), esc_html( $sanitizer_class ) ), '0.1' );
		continue;
	}

	$sanitizer->sanitize();

	$scripts = array_merge( $scripts, $sanitizer->get_scripts() );
	$styles = array_merge( $styles, $sanitizer->get_styles() );
}

$sanitized_content = AMP_DOM_Utils::get_content_from_dom( $dom );

echo $sanitized_content . PHP_EOL;