Edit report at https://bugs.php.net/bug.php?id=9654&edit=1
ID: 9654
Comment by: zyss at mail dot zp dot ua
Reported by: adam at cryptocomm dot com
Summary: Add is_type() function
Status: Open
Type: Feature/Change Request
Package: *General Issues
Operating System: *
PHP Version: *
Block user comment: N
Private report: N
New Comment:
Why not to write your own?
Note, however, that PHP is slow as mud so even a single function call costs
much and it's usually much faster to use native functions for type checking (if
you're concerned about the speed).
Also it's quite easy to mistype a type :) so using native functions is a
preferred option as to me.
<?php
function is_type($var, $type) {
switch ($type) {
case 'null':
return $var === null;
case 'int':
case 'integer':
case 'long':
return is_int($var);
case 'float':
case 'double':
case 'real':
return is_float($var);
case 'num':
case 'numeric':
return is_numeric($var);
case 'finite':
return is_finite($var);
case 'nan':
return is_nan($var);
case 'scalar':
return is_scalar($var);
case 'res':
case 'resource':
return is_resource($var);
case 'string':
return is_string($var);
case 'object':
return is_object($var);
case 'array':
return is_array($var);
case 'callable':
return is_callable($var);
case 'bool':
case 'boolean':
return is_bool($var);
case 'dir':
return is_dir($var);
case 'file':
return is_file($var);
case 'readable':
return is_readable($var);
case 'writable':
case 'writeable':
return is_writable($var);
case 'exec':
case 'executable':
return is_executable($var);
case 'link':
case 'symlink':
return is_link($var);
case 'uploaded':
case 'uploaded_file':
return is_uploaded_file($var);
case 'soap_fault':
return is_soap_fault($var);
}
return false;
}
/******* TEST CODE *******/
echo 'null(1): ', is_type(null, 'null') ? 'Y' : 'N', "\n";
echo 'int(1): ', is_type(1, 'int') ? 'Y' : 'N', "\n";
echo 'integer(1): ', is_type(1, 'integer') ? 'Y' : 'N', "\n";
echo 'long(1): ', is_type(1, 'long') ? 'Y' : 'N', "\n";
echo 'float(1.0): ', is_type(1.0, 'float') ? 'Y' : 'N', "\n";
echo 'double(1.0): ', is_type(1.0, 'double') ? 'Y' : 'N', "\n";
echo 'real(1.0): ', is_type(1.0, 'real') ? 'Y' : 'N', "\n";
$f = fopen("http://www.example.com/";, "r");
echo 'res($f): ', is_type($f, 'res') ? 'Y' : 'N', "\n";
echo 'resource($f): ', is_type($f, 'resource') ? 'Y' : 'N', "\n";
fclose($f);
echo 'string("abc"): ', is_type('abc', 'string') ? 'Y' : 'N', "\n";
echo 'object(stdClass): ', is_type(new stdClass(), 'object') ? 'Y' : 'N', "\n";
echo 'array([1, 2, 3]): ', is_type(array(1, 2, 3), 'array') ? 'Y' : 'N', "\n";
echo 'callable(Closure): ', is_type(function() { }, 'callable') ? 'Y' : 'N',
"\n";
echo 'bool(true): ', is_type(true, 'bool') ? 'Y' : 'N', "\n";
echo 'boolean(true): ', is_type(true, 'boolean') ? 'Y' : 'N', "\n";
echo 'dir(__DIR__): ', is_type(__DIR__, 'dir') ? 'Y' : 'N', "\n";
echo 'file(__FILE__): ', is_type(__FILE__, 'file') ? 'Y' : 'N', "\n";
echo 'readable(__FILE__): ', is_type(__FILE__, 'readable') ? 'Y' : 'N', "\n";
echo 'writable(__FILE__): ', is_type(__FILE__, 'writable') ? 'Y' : 'N', "\n";
echo 'writeable(__FILE__): ', is_type(__FILE__, 'writeable') ? 'Y' : 'N', "\n";
$php = $_SERVER['argv'][0];
echo 'exec($php): ', is_type($php, 'exec') ? 'Y' : 'N', "\n";
echo 'executable($php): ', is_type($php, 'executable') ? 'Y' : 'N', "\n";
$link = __FILE__ . '.symlink';
if (function_exists('symlink'))
@symlink(__FILE__, $link);
echo 'link($link): ', is_type($link, 'link') ? 'Y' : 'N', "\n";
@unlink($link);
$upl = @$_FILES['file']['tmp_name'];
echo 'uploaded(__FILE__): ', is_type(__FILE__, 'uploaded') ? 'Y' : 'N', "\n";
echo 'uploaded_file(__FILE__): ', is_type(__FILE__, 'uploaded_file') ? 'Y' :
'N', "\n";
$client = new
SoapClient('http://graphical.weather.gov/xml/DWMLgen/wsdl/ndfdXML.wsdl',
array('exceptions' => 0));
$result = $client->SomeFunction();
echo 'soap_fault($result): ', is_type($result, 'soap_fault') ? 'Y' : 'N', "\n";
Previous Comments:
------------------------------------------------------------------------
[2001-03-09 09:57:24] adam at cryptocomm dot com
It would be much more clean and
quick to consolidate all the "is"
functions into like is_type($variable, "int")
and have it return the true or false
based on if the value of $variable is
the datatype you specified as the second
paramter. This makes more sense to
me then having like 20 is_whatever functions.
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=9654&edit=1
