How can PHP be used to determine the schema of an XML file based on its content?

To determine the schema of an XML file based on its content using PHP, you can parse the XML file and extract the necessary information to infer its schema. This can be done by analyzing the structure of the XML elements, attributes, and their values. 

<?php
$xmlString = file_get_contents('example.xml');
$xml = simplexml_load_string($xmlString);

$schema = [];

foreach ($xml->children() as $child) {
    foreach ($child->attributes() as $key => $value) {
        $schema[$child->getName()][$key] = gettype($value);
    }
    foreach ($child->children() as $subChild) {
        foreach ($subChild->attributes() as $key => $value) {
            $schema[$child->getName()][$subChild->getName()][$key] = gettype($value);
        }
    }
}

print_r($schema);
?>

Keywords

PHP XML schema content-based validation

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