How to convert numbers to string in php?

php method to convert numbers into strings: 1. Add the target type enclosed in parentheses before the variable to be converted, for example "(string)3.14"; 2. Use the strval() function, For example "strval(3.14)"; 3. Use the settype() function.

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PHP data type conversion (character conversion Numbers, numbers to characters)

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

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

• ## (float), (double), (real): converted 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 the target type enclosed in parentheses before the variable to be converted

• Use three specific types of conversion functions, intval(), floatval(), strval() [Memory : The destination type you want to convert val()】

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

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

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

Output:

float 3.14
string '3.14' (length=4)

The 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"
var_dump($int); //输出int(123)   
var_dump($float); //输出float(123.9)
var_dump($str); //输出string(123.9)  
?>

Output:

int 123
float 123.9
string '123.9' (length=5)

The third conversion method: settype()

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

Output:

boolean true
string '12.8' (length=4)

The settype() function is used to set the type of a variable.

PHP version requirements: PHP 4, PHP 5, PHP 7

Syntax

bool settype ( mixed &$var , string $type )

Parameter description:

• $var: variable to be converted.

• #$type: Possible values ​​for type are.
  • "boolean" (or "bool" since 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)

Return value:

Returns TRUE when the setting is successful, otherwise it fails Returns FALSE.

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