How to force convert value to floating point type in php

php method to force a value to a floating point type: 1. Add the target type "(float)", "(double)" or "in parentheses" before the value or variable that needs to be converted. (real)"; 2. Use the settype() function, the syntax is "settype (value or variable to be converted, "float")".

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

php will strengthen the value Convert to floating point type

Method 1: Add the target type enclosed in parentheses before the value or variable to be converted

The target type converted to floating point type is written as:

• (float)

• (double)

• (real)

Example:

'; $float2 = (double)124; echo '变量 $float2 的类型为：'.gettype($float2).'，值为：'.$float2.'
'; $float3 = (real)TRUE; echo '变量 $float3 的类型为：'.gettype($float3).'，值为：'.$float3.'
'; ?>

Method 2: Use the settype() function

The settype() function is used to set the type of a variable.

Syntax:

settype ( $var , $type )

can convert the$varvalue into a value of the specified$typeltype.

$type: Possible values for type are:

• "boolean" (or "bool" since PHP 4.2.0)

• "integer" (or "int" since PHP 4.2.0)

• "float" (only in PHP 4.2. Can be used after 0, for "double" used in older versions is now disabled)

• "string"

• "array"

• "object"

• "null" (from PHP 4.2.0 onwards)

Note: The settype() function will change the original type of the variable. If the setting is successful, it will return TRUE and if it fails, it will return FALSE.

Example:

'; $num=154; $float2 = settype($num, 'float'); echo '变量 $num 的类型为：'.gettype($float2).'，值为：'.$num.'
'; $bool=TRUE; $float3 = settype($bool, 'float'); echo '变量 $bool 的类型为：'.gettype($float3).'，值为：'.$bool.'
'; ?>

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