How to convert numeric string to numeric type in php

Conversion method: 1. Use intval() function, syntax "intval($str)"; 2. Use floatval() function, syntax "floatval($str)"; 3. Use settype() function , syntax "settype($str,"float")".

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

php Lieutenant General Number Convert string to numeric type

#Method 1: Use intval() function to convert to integer type

intval(): used to obtain the variable Integer value;

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;2334.976&#39;;
var_dump(intval($str));
?>

Method 2: Use floatval() function to convert to floating point type

floatval(): used Get the floating point value of the variable;

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;2334.976&#39;;
var_dump(floatval($str));
?>

Method 3: Use the settype() function to convert to an integer or floating point type

settype ($var,$type) The function is used to set the variable $var to the specified data type $type.

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;2334.976&#39;;
settype($str,"integer");
var_dump($str);

$str = &#39;2334.976&#39;;
settype($str,"float");
var_dump($str);
?>

The value of $type can be:

• "boolean" ( or "bool", starting from PHP 4.2.0)

• "integer" (or "int", starting from 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)

# The settype() function will change the original variable.

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