"PHP" into a method of rounding, rounding, ignoring decimals, and so on integer method Daquan

PHP takes integer functions commonly used four methods, the following collection of four functions, often used to take the whole function, a small sum today! Actually very simple, is just a few functions ~ ~ mainly:Ceil， Floor，round，intvalPHP Four ways to take integer functions,The following collection of four functions, often used to take the whole function, today a small summary! Actually very simple, is just a few functions ~ ~ mainly:Ceil， Floor，round，intvalFirst,Ceil-into a method of rounding instructionsfloat Ceil(floatvalue) returns the next integer not less than value, which is a bit if there are fractional parts. Ceil() The returned type is stillfloat, because the range of float values is usually greater thanintegerbe big. Example1.Ceil() Example<?PHPEcho Ceil(4.3);//5    Echo Ceil(9.999);//Ten?>Second, Floor-Rounding out the method of rounding instructionsfloat  Floor(floatvalue) returns the next integer not less than value, and the fractional part of value is rounded off.  Floor() The returned type is stillfloat, because the range of float values is usually greater thanintegerbe big. Example1. Floor() Example<?PHPEcho  Floor(4.3);//4    Echo  Floor(9.999);//9?>Third,round-Rounding out the floating-point numbersfloat round(floatVal [,int precision]) Returns the result of rounding Val based on the specified precision precision (number of digits after decimal point).      Precision can also be negative or 0 (the default value). Example1.round() Example<?PHPEcho round(3.4);//3    Echo round(3.5);//4    Echo round(3.6);//4    Echo round(3.6, 0);//4    Echo round(1.95583, 2);//1.96    Echo round(1241757,-3);//1242000    Echo round(5.045, 2);//5.05    Echo round(5.055, 2);//5.06?>Four,intval-Convert the variable to an integer form Example intval ()<?PHPEcho intval(4.3);//4    Echo intval(4.6);//4?>

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"PHP" into a method of rounding, rounding, ignoring decimals, and so on integer method Daquan