How to convert to int type in php?

Conversion method: 1. Add "(int)" before the variable to be converted to force conversion to int type, for example "(int)3.14", the value is 3; 2. Use the intval() function , the syntax is "intval(value)"; 3. Use the settype() function, the syntax is "settype(value,"int")".

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

There are three PHP data types A conversion method:

1. Forced type conversion

Type coercion in PHP is very similar to that in C: in the The variable is preceded by 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 converted to int type

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

• Output:

  float 3.14
  int 3

2. Use conversion functions

PHP has 3 specific types of conversion functions:

intval(): used to obtain variables Integer value.

Returns the integer value of variable var by using the specified base conversion (default is decimal). intval() cannot be used with object, otherwise an E_NOTICE error will be generated and 1 will be returned.

floatval(): used to obtain the floating point value of a variable.

• strval(): used to get the string value of a variable.

• Example: php converted to int type

  <?php  
  $str="123.9abc";  
  $int=intval($str);     //转换后数值：123  
  var_dump($int);  
  ?>

  Output: php converted to int type

int 123

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

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

Example:

<?php  
$str="123.9sdc";  
$int=settype($str,"int");  
var_dump($int);  //输出bool(true)  
var_dump($str); //输出int(12)  
?>

Output:

boolean true
int 123

Related recommendations:

php training

The above is the detailed content of How to convert to int type in php?. For more information, please follow other related articles on the PHP Chinese website!