What are the functions to convert numbers to strings in php?

Function to convert numbers to strings in php: 1. strval(), syntax format "strval (numeric variable)", which can obtain and return the string value of the variable; 2. settype(), syntax format " settype(numeric variable,'string')" can set the variable to the "string" type.

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

digital conversion in php String

Method 1: Use strval() function

<?php
$int_str= 123.52;
var_dump($int_str);
$str = strval($int_str);
var_dump($str);
?>

Output:

float 123.52
string '123.52' (length=6)

Description:

The strval() function is a conversion function used to convert numerical values ​​to strings. It can obtain and return the string value of a variable.

The strval() function converts the data type, but does not affect the type of the original variable.

Method 2: settype() function

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$old = 500;
echo "原数据类型" . gettype($old), &#39;<br>&#39;;
$current = gettype(settype($old, &#39;string&#39;));
echo "现数据类型" . gettype($current), &#39;<hr>&#39;;

$old = 500.25;
echo "原数据类型" . gettype($old), &#39;<br>&#39;;
$current = gettype(settype($old, &#39;string&#39;));
echo "现数据类型" . gettype($current), &#39;<hr>&#39;;
?>

Output:

Description: settype( ) function is used to set the type of a variable. The syntax is as follows:

settype ( $var , $type )

Set the type of variable var to type.

To be converted Variables. The possible values ​​of settype() function will affect The type of the original variable.

Parameters	Description
##var
type	##type are: "boolean" (or "bool" since PHP 4.2.0) "integer" (or "int" since 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)

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