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checkdnsrr()

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<?php
$bool 
checkdnsrr (
    
// string $host
    
?  // [string $type = "MX"]
);
?>
Result
$bool = true
Examples
#1 checkdnsrr  ("php.net")
See also
dns_get_record, gethostbyaddr, gethostbyname, gethostbynamel, getmxrr