How to convert numbers into strings in php?

How to convert numbers into strings in php: 1. Use forced type conversion, syntax "(string)number"; 2. Use strval() function, syntax "strval(number)"; 3. Use the settype() function, the syntax is "settype(number, "string")".

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php Convert numbers into strings Method

1. Forced type conversion

Type coercion in PHP is very similar to that in C: add before the variable to be converted The target type enclosed in parentheses.

The allowed casts are:

• (int),(integer) - Convert to integer type

• (bool ),(boolean) - Convert to Boolean type

• (float),(double),(real) - Convert to floating point type

• (string)                                                                                                                                                                                                                                         through

• Note that spaces and tabs are allowed within brackets

• Example:

  <?php   
  $num1=314;   
  $num2=(string)$num1;   
  var_dump($num1); 
  var_dump($num2); 
  ?>

  Output:

int 314
string '314' (length=3)

2. Use the strval() function

The strval() function is used to obtain the string value of the variable.

Example:

<?php   
$num=31415;   
$str=strval($num); 
var_dump($num);  
var_dump($str); 
?>

Output;

int 31415
string '31415' (length=5)

3. Use the settype() function

settype () function is used to set the type of variables.

settype ( var , type )

Return value: TRUE when the setting is successful, FALSE when the setting fails. Example:

<?php   
$num=12.8;   
$str=settype($num,"string");   
var_dump($str);  
var_dump($num); 
?>

boolean true
string '12.8' (length=4)

Judgment string is all composed of numbers

<?php
$str = "123"
if(ereg(&#39;^[0-9]+$&#39;, $str)) {
    // true
}
?>

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