PHP data type conversion (character to number, number to character)

This article mainly introduces PHP data type conversion (character to number, number to character), which has a certain reference value. Now I share it with you. Friends in need can refer to it

PHP data Type conversion is a forced conversion. The PHP data types that are allowed to be converted are:

● (int), (integer): converted to integer

● (float), (double), (real) : Convert to floating point type

● (string): Convert to string

● (bool), (boolean): Convert to Boolean type

● (array) : Convert to array

● (object): Convert to object

There are three conversion methods for PHP data types:

● Add parentheses before the variable to be converted. The target type is

● Use three specific types of conversion functions, intval(), floatval(), strval() [Memory: the target type val() you want to convert]

● Use the general type conversion function settype(mixed var,string type)

The first conversion method: (int) (bool) (float) (string) ( array) (object)

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<?php   
$num1=3.14;   
$num2=(int)$num1;   
var_dump($num1); //输出float(3.14)   
var_dump($num2); //输出int(3)   
?>

Second conversion method: intval() floatval() strval()

<?php   
$str="123.9abc";   
$int=intval($str);     //转换后数值：123   
$float=floatval($str); //转换后数值：123.9   
$str=strval($float);   //转换后字符串："123.9"    
?>

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The third conversion method: settype();

<?php   
$num4=12.8;   
$flg=settype($num4,"int");   
var_dump($flg);  //输出bool(true)   
var_dump($num4); //输出int(12)   
?>

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