February 2013
Intermediate to advanced
538 pages
20h 55m
English
Content preview from Programming PHP, 3rd Edition
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Name
checkdnsrr
Synopsis
bool checkdnsrr(stringhost[, stringtype])
Searches DNS records for a host having the given type. Returns
true if any records are found, and
false if none are found. The host
type can take any of the following values (if no value is specified,
MX is the default):
| IP address. |
| Mail exchanger. |
| Name server. |
| Start of authority. |
| Pointer to information. |
| Canonical name. |
| 128-bit IPv6 address. |
| Defined as part of early IPv6 but downgraded to experimental. |
| Generalized service location record. |
| Regular expression based rewriting of domain names. |
| Originally for human-readable text. However, this record also carries machine-readable data. |
| Any of the above. |
Check http://en.wikipedia.org/wiki/List_of_DNS_record_types for more details.
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