How to convert data to floating point number in php

How to convert floating point numbers in php: 1. Use the floatval() function to get the floating point value of the variable, the syntax is "floatval (data to be converted)"; 2. Use the settype() function, the syntax is " settype(data to be converted, "float")" can convert the specified data to a floating point type.

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

PHP provides two built-in functions, which can Convert other types of data to floating point numbers:

• floatval() function

• settype() function

1. Use the floatval() function

The floatval() function is a function that specifically converts other types into floating point types. It can obtain the floating point value of a variable.

Note: floatval cannot be used for arrays or objects.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$var = &#39;122.34343runoob&#39;;
echo "原数据类型：";
var_dump($var);
$float= floatval($var);
echo "修改后的类型：";
var_dump($float);
?>

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$var = TRUE;
echo "原数据类型：";
var_dump($var);
$float= floatval($var);
echo "修改后的类型：";
var_dump($float);
?>

2. Use the settype() function

settype( ) function can convert a value to a specified data type (controlled by the second parameter).

You only need to set the second parameter of the function to "float" to convert the data into a floating point number.

Note: This function will modify the original variable; if the setting is successful, it will return TRUE, if it fails, it will return FALSE.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$foo = "5bar"; // string
$bar = true;   // boolean
echo "原数据类型：";
var_dump($foo);
var_dump($bar);
settype($foo, "float");
settype($bar, "float");
echo "修改后的类型：";
var_dump($foo);
var_dump($bar);
?>

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