PHP - IP To Numeric Value

As a complement of MySQL - IP To Numeric Value, here is how to convert IP to numeric value using PHP.

int ip2long ( string $ip_address )

printf(“%u\n”,?ip2long(“209.207.224.40″));?//return 3520061480.

To convert numeric value to IP:

string long2ip ( int $proper_address )

long2ip(3520061480);?//return 209.207.224.40

Because PHP’s integer type is signed, and many IP addresses will result in negative integers, you need to use the “%u” formatter of sprintf() or printf() to get the string representation of the unsigned IP address.

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