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PHP ÅжÏFORMÀ´µÄÊý¾ÝÊÇ·ñΪÕûÊý

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echo "ÊÇÕûÊý";
} ......

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PHPÓïÑÔ±¾ÉíÊDz»Ö§³Ö¶àÏ̵߳Ä. ×ܽáÁËÒ»ÏÂÍøÉϹØÓÚPHPÄ£Äâ¶àÏ̵߳ķ½·¨, ×ܵÄÀ´Ëµ, ¶¼ÊÇÀûÓÃÁËPHPµÄºÃ»ï°éÃDZ¾ÉíËù¾ßÓеĶàÏß³ÌÄÜÁ¦.
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PHP Floating point precision

Floating point precision
It is typical that simple decimal fractions like 0.1
or
0.7
cannot be converted into their internal binary
counterparts without a small loss of precision. This can lead to
confusing
results: for example, floor((0.1+0.7)*10)
will usually
return 7
......

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