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property_exists: Update example to show more scenarios. #4508

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property_exists: Update example to show more scenarios. #4508

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53 changes: 41 additions & 12 deletions reference/classobj/functions/property-exists.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -65,26 +65,55 @@
<![CDATA[
<?php

class myClass {
public $mine;
private $xpto;
static protected $test;
#[AllowDynamicProperties]
class MyClass {
public $public;
private $private;
static protected $protectedStatic;

static function test() {
var_dump(property_exists('myClass', 'xpto')); //true
// ignored by property_exists
public function __isset(string $name) {
return true;
}

// ignored by property_exists
public function __get(string $name) {
return '';
}
}

var_dump(property_exists('myClass', 'mine')); //true
var_dump(property_exists(new myClass, 'mine')); //true
var_dump(property_exists('myClass', 'xpto')); //true
var_dump(property_exists('myClass', 'bar')); //false
var_dump(property_exists('myClass', 'test')); //true
myClass::test();
$instance = new MyClass();
$instance->instanced = 'abc';

foreach (['$instance' => $instance, 'MyClass::class' => MyClass::class] as $type => $value) {
foreach (['public', 'protectedStatic', 'private', 'undefined', 'instanced'] as $property) {
printf(
"property_exists(%s, %s) === %s\n",
$type,
var_export($property, true),
var_export(property_exists($value, $property), true),
);
}
}

?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
property_exists($instance, 'public') === true
property_exists($instance, 'protectedStatic') === true
property_exists($instance, 'private') === true
property_exists($instance, 'undefined') === false
property_exists($instance, 'instanced') === true
property_exists(MyClass::class, 'public') === true
property_exists(MyClass::class, 'protectedStatic') === true
property_exists(MyClass::class, 'private') === true
property_exists(MyClass::class, 'undefined') === false
property_exists(MyClass::class, 'instanced') === false
]]>
</screen>
</example>
</para>
</refsect1>
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