How to force convert string to int type in php

php method to force a string to int type: 1. Use the intval() function to get the integer value of the variable, the syntax is "intval (string variable)"; 2. Use settype(), Variables can be set to a specified type with the syntax "settype(string variable, "integer")".

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

Method 2: Use intval() Function

intval() function is used to get the integer value of a variable.

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;32.14abc&#39;;
$int = intval($str);
echo $int."<br>";
echo &#39;变量 $int 的类型为：&#39; . gettype($int) . &#39;<br>&#39;;
?>

Description: The intval() function returns the integer value of the variable var by using the specified base conversion (the default is decimal). intval() cannot be used with object, otherwise an E_NOTICE error will be generated and 1 will be returned.

Method 3: Use the settype() function

settype ($var,$type)The function can set the variable$varSet to the specified type $type, $type Settable values:

• "boolean" (or "bool", As of PHP 4.2.0)

• "integer" (or "int" as of PHP 4.2.0)

• "float " (Only available after PHP 4.2.0, "double" used in older versions is now deprecated)

• "string"

• "array"

• "object"

• "null" (from PHP 4.2.0)

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;3542abc&#39;;
settype($str,"integer");
echo $str."<br>";
echo &#39;修改后的类型为：&#39; . gettype($str) . &#39;<br>&#39;;
?>

Description:

The settype() function changes the type of the variable itself.

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