探讨PHP函数ip2long转换IP时数值太大产生负数的解决方法

【造成原因】:Because PHP’s integer type is signed, and many IP addresses will result in negative integers. 【解决办法】:其官方手册中提到,可以“you need to use the “%u” formatter of sprintf() or printf() to get the string representation of the unsigned IP address” 即,printf( ‘%u’, ip2long( ‘IP地址’ ) ); 或者将其先转换为二进制然后在转换为十进制,b