PHP string函数小结
PHP string函数总结PHP string函数总结?ceil、floor、round、/、%?float c
PHP string函数总结
PHP string函数总结
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ceil、floor、round、/、%
?
float
ceil ( float
$value )向上去整（进一） ??? cout(1.8)=>2
??? cout(-1.8)=>2-1
float
floor ( float
$value )向下去整(舍去)??? floor(1.8)=>1??? floor(-1.8)=>-2
round — 对浮点数进行四舍五入
float
round ( float
$val [, int
$precision ] )
??? echo?round(1.95583,?2);??//?1.96
??? echo?round(1241757,?-3);?//?1242000=================================
