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:

<?php
header("Content-type:text/html;charset=utf-8");
$float1 = (float)&#39;123.456abc&#39;;
echo &#39;变量 $float1 的类型为：&#39;.gettype($float1).&#39;，值为：&#39;.$float1.&#39;<br>&#39;;
$float2 = (double)124;
echo &#39;变量 $float2 的类型为：&#39;.gettype($float2).&#39;，值为：&#39;.$float2.&#39;<br>&#39;;
$float3 = (real)TRUE;
echo &#39;变量 $float3 的类型为：&#39;.gettype($float3).&#39;，值为：&#39;.$float3.&#39;<br>&#39;;
?>

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 $var value into a value of the specified $typel type.

$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:

<?php
header("Content-type:text/html;charset=utf-8");
$str="123.456abc";
$float1 = settype($str, &#39;float&#39;);
echo &#39;变量 $str 的类型为：&#39;.gettype($float1).&#39;，值为：&#39;.$str.&#39;<br>&#39;;
$num=154;
$float2 = settype($num, &#39;float&#39;);
echo &#39;变量 $num 的类型为：&#39;.gettype($float2).&#39;，值为：&#39;.$num.&#39;<br>&#39;;
$bool=TRUE;
$float3 = settype($bool, &#39;float&#39;);
echo &#39;变量 $bool 的类型为：&#39;.gettype($float3).&#39;，值为：&#39;.$bool.&#39;<br>&#39;;
?>

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