PHP中奇怪的数字
由一条别人adodb的bug引发的思考
echo 09," => (09) <br>";
echo 9," => (9) <br>";
你可以试一下.输出结果是:
0 => (09)
9 => (9)
而不是
09 => (09)
9 => (9)
这个译者做了下测试,经过分析得出.0开头的数字会被当成8进制,0x开头的会被当成16进制,如下:
echo 0x11," => (011) <br>";
echo 010," => (010) <br>";
这个会输出:
17 => (011)
8 => (010)
当然是10x16+1=17
1x8+0=8
OK.
Someone reported a bug in ADOdb, the open source db library i maintain. I went crazy for half an hour until i realised the problem. Here''s a little gotcha you can try:
echo 09," => (09) <br>";
echo 9," => (9) <br>";
If you expect the above code to produce the same values, you are sadly mistaken. Try it. I will post a followup later :)
补充：Php教程,Php常用代码
