PHP Take integer Summary

• PHP takes integer functions commonly used in four ways, the following collection of four functions;
• Often used to take the whole function, today a small sum! Actually very simple, is just a few functions ~ ~ mainly: Ceil,floor,round,intval
• Ceil-into one method to take the whole
  Description
  float ceil (float value)
  Returns the next integer not less than value, in which value is entered if there is a fractional part. The type returned by Ceil () is still float, because the range of float values is usually larger than the integer.
• Example 1. Ceil () example
• <?php
  echo ceil (4.3); 5
  echo ceil (9.999); 10
  ?>
• floor-and rounding out the whole process
  Description
  Float floor (float value)
  Returns the next integer not less than value, rounding out the fractional part of value. The type returned by floor () is still float, because the range of float values is usually larger than the integer.
• Example 1. Floor () example
• <?php
  echo floor (4.3); 4
  echo Floor (9.999); 9
  ?>
• Round-rounding of floating-point numbers
  Description
  Float round (float val [, 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).
• Example 1. Round () example
• <?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-the variable into integer form
• Example Intval ()
• <?php
• echo intval (4.3); 4
• Echo intval (4.6); 4
• ?>
• Reprinted from: Http://www.cnblogs.com/zcy_soft/archive/2011/04/13/2014776.html#commentform