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<?php | |
function is_valid_mf2_json($input) { | |
// Input to this function must be an array | |
if(!is_array($input)) | |
return false; | |
// Keys type and properties are required at a minimum and must be arrays | |
if(!isset($input['type']) || !is_array($input['type'])) | |
return false; | |
if(!isset($input['properties']) || !is_array($input['properties'])) | |
return false; | |
// Every value of type must be a string beginning with h- | |
foreach($input['type'] as $type) { | |
if(!is_string($type) || substr($type, 0, 2) != 'h-') | |
return false; | |
} | |
foreach($input['properties'] as $property) { | |
// Every property must be an array | |
if(!is_array($property)) | |
return false; | |
// If a value of a property is not a string, it must be a valid mf2 object | |
foreach($property as $val) { | |
if(!is_string($val)) { | |
if(!is_valid_mf2_json($val)) | |
return false; | |
} | |
} | |
} | |
return true; | |
} |
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