Method: 1. Add the target type "(float)" enclosed in parentheses before the variable, the syntax is "(float)$val"; 2. Use floatval(), the syntax "floatval($val )"; 3. Use settype(), the syntax is "settype($val, "float")".
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php forces the value Type conversion to float
Method 1: Add the target type enclosed in parentheses "(float)
"## before the variable to be converted #
<?php header("Content-type:text/html;charset=utf-8"); $str = '123.456abc'; $float = (float)$str; echo $float."<br>"; echo '变量 $float 的类型为:' . gettype($float) . '<br>'; ?>
Method 2: Use floatval() function
floatval(): used to obtain the floating point value of a variable;<?php header("Content-type:text/html;charset=utf-8"); $str = '123.456abc'; $float = floatval($str); echo $float."<br>"; echo '变量 $float 的类型为:' . gettype($float) . '<br>'; ?>
Method 3: Use settype() function
Syntax:The
settype ( $var ,$type )
<?php header("Content-type:text/html;charset=utf-8"); $str = '123.456abc'; settype($str,"float"); echo $str."<br>"; echo '修改后的类型为:' . gettype($str) . '<br>'; ?>
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