How to convert string to integer type in php

Conversion method: 1. Use the intval() function, syntax "intval($str)"; 2. Force the variable type to be converted by adding the target type enclosed in parentheses before the string variable "( integer)", syntax "(integer)$str".

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

php will string Convert to integer type

Method 1: Use the intval() function

intval(): used to obtain the integer value of the variable;

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;125.456abc&#39;;
$int = intval($str);
var_dump($int);
?>

Output result:

Method 2: Add parentheses before the string variable The target type is forced to convert the variable type "(integer)"

(integer): String variables can be converted into integer types

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;1253.456abc&#39;;
$int = (integer)$str;
var_dump($int);
?>

Output results:

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