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Description

1. Foreach is a tool through objects that can be used alone or in conjunction with iterators and generators.

2. If foreach is defined as a class, you can output all attributes, and if it is called as a function outside the category, you can only output public properties.

Example

Class MyClass {public $var1 = 'value 1 methods; protected $protected =' protected var'; private $private = 'private var'; function iterateVisible () {foreach ($this as $key = > $value) {/ / within the class, foreach is defined in the member method; print "$key = > $value\ n";}} $class = new MyClass () Foreach ($class as $key = > $value) {/ / read object print "$key = > $value\ n" as an out-of-class function;} / / var1 = > value 1, output only public attributes $class- > iterateVisible () / / var1 = > value 1, protected = > protected var, private = > private var output all object attributes The above is about the content of this article on "how to use foreach in php". I believe we all have a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please follow the industry information channel.

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