<?php
$obj = new stdClass;
$obj->{123} = '456'; // defined property but unusable as obj->property; see below.
print_r($obj);
echo 'Via {123}: ' . $obj->{123},"\n";
if (isset($obj->{123})) { echo '123 is set',"\n";}
if (property_exists($obj,123)) echo 'property 123 exists',"\n";
echo $obj->{123};
//echo "\n",$obj->123; // Parse error: ...unexpected '123' (T_LNUMBER), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$'
echo "\n..............................\n";
$obj->{'a123'} = $obj->{123};
print_r($obj);
echo 'Via Property a123: ' . $obj->a123,"\n";
// making a hash out of property a
$obj->a["123"] = $obj->{'123'};
$obj->a["a123"] = $obj->{'a123'};
var_dump($obj);
echo 'Via Property "a" and hashkey "123": ' . $obj->a["123"],"\n";
// contrast:
$obj = (object)array('123' => '456'); // '123' => 123 and identifers must be strings
print_r($obj);
echo $obj->{'123'},"\n"; // so "Undefined property: stdClass::$123"
if (!property_exists($obj,'123')) echo 'property 123 does not exist',"\n";
$obj = new stdClass;
$obj->name = "blabe";
echo "The rain in {$obj->name} ...";
stdClass Object
(
[123] => 456
)
Via {123}: 456
123 is set
property 123 exists
456
..............................
stdClass Object
(
[123] => 456
[a123] => 456
)
Via Property a123: 456
object(stdClass)#1 (3) {
["123"]=>
string(3) "456"
["a123"]=>
string(3) "456"
["a"]=>
array(2) {
[123]=>
string(3) "456"
["a123"]=>
string(3) "456"
}
}
Via Property "a" and hashkey "123": 456
stdClass Object
(
[123] => 456
)
Notice: Undefined property: stdClass::$123 in /in/AMqjj on line 24
property 123 does not exist
The rain in blabe ...
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.5
stdClass Object
(
[123] => 456
)
Via {123}: 456
123 is set
property 123 exists
456
..............................
stdClass Object
(
[123] => 456
[a123] => 456
)
Via Property a123: 456
object(stdClass)#1 (3) {
["123"]=>
string(3) "456"
["a123"]=>
string(3) "456"
["a"]=>
array(2) {
[123]=>
string(3) "456"
["a123"]=>
string(3) "456"
}
}
Via Property "a" and hashkey "123": 456
stdClass Object
(
[123] => 456
)
Notice: Undefined property: stdClass::$123 in /in/AMqjj on line 24
property 123 does not exist
The rain in blabe ...
Output for 5.0.0 - 5.0.5
stdClass Object
(
[123] => 456
)
Via {123}: 456
123 is set
Fatal error: Call to undefined function property_exists() in /in/AMqjj on line 7
Process exited with code 255.
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Property name must be a string in /in/AMqjj on line 3
Process exited with code 255.