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is_object

(PHP 4, PHP 5, PHP 7)

is_object — Finds whether a variable is an object

Description

代码语言:javascript
复制
bool is_object ( mixed $var )

Finds whether the given variable is an object.

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is an object, FALSE otherwise.

Examples

Example #1 is_object() example

代码语言:javascript
复制
<?php
// Declare a simple function to return an 
// array from our object
function get_students($obj)
{
    if (!is_object($obj)) {
        return false;
    }

    return $obj->students;
}

// Declare a new class instance and fill up 
// some values
$obj = new stdClass();
$obj->students = array('Kalle', 'Ross', 'Felipe');

var_dump(get_students(null));
var_dump(get_students($obj));
?>

Notes

Note: This function will return FALSE if used on an unserialized object where the class definition is not present (even though gettype() returns object).

See Also

  • is_bool() - Finds out whether a variable is a boolean
  • is_int() - Find whether the type of a variable is integer
  • is_float() - Finds whether the type of a variable is float
  • is_string() - Find whether the type of a variable is string
  • is_array() - Finds whether a variable is an array

← is_numeric

is_real →

代码语言:txt
复制
 © 1997–2017 The PHP Documentation Group

Licensed under the Creative Commons Attribution License v3.0 or later.

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