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PHPUnit snippet for checking if a string is valid HTML using DOMDocument at a basic level.
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| protected function checkHTML($body) | |
| { | |
| libxml_use_internal_errors(true); | |
| $dom = new \DOMDocument(); | |
| $dom->loadHTML($body, LIBXML_HTML_NOIMPLIED + LIBXML_HTML_NODEFDTD); | |
| // Check for no errors | |
| $this->assertCount(0, libxml_get_errors()); | |
| // Check for doctype | |
| $this->assertInstanceOf(\DOMDocumentType::class, $dom->childNodes[0]); | |
| // Check for html, head, and body nodes | |
| $xpath = new \DOMXPath($dom); | |
| $this->assertCount(1, $xpath->query('/html'), 'No <html> node'); | |
| $this->assertCount(1, $xpath->query('/html/head'), 'No valid <head> node'); | |
| $this->assertCount(1, $xpath->query('/html/body'), 'No valid <body> node'); | |
| } |
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