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
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