How to use PHP to retrieve the entire function _ PHP Tutorial

Describes how to use PHP to retrieve the entire function. For the powerful ceil -- the sum obtained by the first method indicates that floatceil (floatvalue) returns the next integer not less than the value. if the value has a decimal part, it goes into one. The class returned by ceil () is powerfulCeil -- integer in a single method
Description
Float ceil (float value)
Returns the next integer of no less than value. if the value has a decimal part, it is entered in one place. The type returned by ceil () is still float, because the float value range is usually larger than integer.

Example 1. ceil () of the PHP function

 
 

  
  
< ?php 
  
  
echo ceil(4.3); // 5 
  
  
echo ceil(9.999); // 10 
  
  
?> 
  
  
 
 
 

Floor -- rounding to get an integer
Description
Float floor (float value)
Returns the next integer not greater than value and rounds the decimal part of value. The return type of floor () is still float, because the float value range is usually larger than that of integer.

Example 1. floor () example

 
 

  
  
< ?php 
  
  
echo floor(4.3); // 4 
  
  
echo floor(9.999); // 9 
  
  
?> 
  
  
 
 
 

Round -- rounds a floating point number
Description
Float round (float val [, int precision])
Returns the result of rounding val by the specified precision (number of digits after decimal point. Precision can also be negative or zero (default ).

Example 1. round ()

 
 

  
  
< ?php 
  
  
echo 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 
  
  
?> 
  
  
 
 
 

Intval --- convert a variable to an integer type

Example of using the entire function in PHP: intval ()

 
 

  
  
< ?php 
  
  
echo intval(4.3); //4 
  
  
echo intval(4.6); // 4 
  
  
?> 
  
  
 
 
 

Ceil -- returns the next integer not less than the value if float ceil (float value) is an integer obtained by the first method. if the value has a decimal part, the second integer is returned. Class returned by ceil...