How to get only the integer part in php

php method to only round the integer part: 1. Round directly through intval; 2. Round up through round; 3. Round up through ceil; 4. Round down through floor.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How does php only take the integer part?

PHP rounding, rounding up, rounding down, decimal interception

Four commonly used methods of PHP rounding function:

1.Direct Round, discard decimals, keep integers: intval();

2. Round to integers: round();

3. Round up, add 1 if there are decimals: ceil() ;

4. Round down: floor().

1. intval—convert the variable into an integer type

If intval is a character type, it will be automatically converted to 0.

intval(3.14159);  // 3
intval(3.64159);  // 3
intval('ruesin'); //0

2. Rounding: round()

Round parameter 1 according to the precision specified by parameter 2. Parameter 2 can be negative or zero (default).

round(3.14159);      // 3
round(3.64159);      // 4
round(3.64159, 0);   // 4
round(3.64159, 2);   // 3.64
round(5.64159, 3);   // 3.642
round(364159, -2);   // 364200

3. Round up and add 1 if there is a decimal: ceil()

Returns the next integer that is not less than value. If value has a decimal part, it will be rounded up by one.

This method is often used when we write paging classes to calculate the number of pages.

ceil(3.14159);  // 4
ceil(3.64159);  // 4

4. Round down: floor()

Returns the next integer that is not greater than value, and rounds the decimal part of value.

floor(3.14159);    // 3
floor(3.64159);    // 3

Recommended learning: "PHP Video Tutorial"

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