Why does PHP return the first value of an array when referencing said array as an object property?
Why does the second echo line in the following code return (string) 'first' rather than an array?
Code:
<?php
$foo = simplexml_load_string(<<<EOF
<?xml version='1.0'?>
<document>
<body>
<content>first</content>
<content>second</content>
</body>
</document>
EOF
);
echo '<pre>$foo entire object:', "\n", prin开发者_StackOverflow社区t_r($foo, true), "\n";
echo '$foo->body->content: ', "\n", $foo->body->content;
?>
Result:
$foo entire object:
SimpleXMLElement Object
(
[body] => SimpleXMLElement Object
(
[content] => Array
(
[0] => first
[1] => second
)
)
)
$foo->body->content:
first
This is not a general PHP feature. Try:
class Foo
{
public function Foo()
{
$this->a = array("foo", "bar");
}
}
$f = new Foo();
print_r($f->a);
It's a feature of SimpleXML that accessing a property like that gets the first applicable child, which can then be converted to a string.
Though SimpleXML is an extension, you could implement something similar in pure PHP using the _get and _toString magic methods.
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