In PHP-GTK2, if you build your own class of an existing PHP-GTK2 class, you may encounter one of the following errors:<\/p>\n
This is somehow (not documented) caused by not calling parent::__construct()<\/span>, the parent constructor. For example, try to run the following snippet: class\u00a0Myclassw <\/span>extends <\/span>GtkWindow <\/span>{ function\u00a0__construct<\/span>()\u00a0{ $this<\/span>-><\/span>show<\/span>(); Gtk<\/span>::<\/span>main<\/span>();<\/span> Now, try this snippet: function\u00a0__construct<\/span>()\u00a0{ $label <\/span>=\u00a0new <\/span>GtkLabel<\/span>(<\/span>“Hello\u00a0World\u00a0–\u00a0will\u00a0work!”<\/span>); All tests were ran on Ubuntu Linux<\/a> 8.04, PHP 5.2.4-2ubuntu5.3 and Linux kernel version 2.6.24-19-generic. If this article helped you solve the problem, please help us spread the word or please leave a comment. Don’t forget to subscribe<\/a> to Compdigitec Labs for more interesting articles!<\/p>","protected":false},"excerpt":{"rendered":" In PHP-GTK2, if you build your own class of an existing PHP-GTK2 class, you may encounter one of the following errors: “PHP Fatal error:\u00a0 Internal object missing in YourclassName wrapper in \/path\/to\/your\/script on line *” “Fatal error: Internal object missing in YourclassName wrapper in \/path\/to\/your\/script on line *” This is somehow (not documented) caused by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,5,4],"tags":[76,75,79,78,864,77,11,80,74],"_links":{"self":[{"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/posts\/22"}],"collection":[{"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/comments?post=22"}],"version-history":[{"count":0,"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/posts\/22\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/media?parent=22"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/categories?post=22"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.compdigitec.com\/labs\/wp-json\/wp\/v2\/tags?post=22"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n<?php
\n<\/span><\/span><\/code>if\u00a0(!<\/span>class_exists<\/span>(<\/span>‘gtk’<\/span>))\u00a0{
\ndie(<\/span>“ERROR:\u00a0No\u00a0PHP-GTK2\u00a0Module.\\n”<\/span>);
\n}<\/span><\/p>\n
\n<\/span>protected\u00a0$label<\/span>;<\/span><\/p>\n
\n<\/span>$label <\/span>=\u00a0new <\/span>GtkLabel<\/span>(<\/span>“Hello\u00a0World\u00a0–\u00a0will\u00a0fail”<\/span>);
\n$this<\/span>-><\/span>add<\/span>(<\/span>$label<\/span>);<\/span><\/p>\n
\n<\/span>$this<\/span>-><\/span>show_all<\/span>();<\/span><\/p>\n
\n}
\n}
\n$a <\/span>=\u00a0new <\/span>Myclassw<\/span>();
\n<\/span>?>
\n<\/span>You should receive the following errors: (path may be different)<\/p>\n\n
\n
\n<?php
\n<\/span>if\u00a0(!<\/span>class_exists<\/span>(<\/span>'gtk'<\/span>))\u00a0{
\ndie(<\/span>\"ERROR:\u00a0No\u00a0PHP-GTK2\u00a0Module.\\n\"<\/span>);
\n}
\nclass <\/span>Myclassw <\/span>extends <\/span>GtkWindow <\/span>{
\nprotected <\/span>$label<\/span>;<\/span><\/span><\/code><\/p>\n
\n<\/span>parent<\/span>::<\/span>__construct<\/span>(); <\/span>\/\/\u00a0New\u00a0line\u00a0inserted\u00a0here<\/span><\/p>\n
\n<\/span>$this<\/span>-><\/span>add<\/span>(<\/span>$label<\/span>);
\n<\/span>$this<\/span>-><\/span>show<\/span>();
\n<\/span>$this<\/span>-><\/span>show_all<\/span>();
\n<\/span>Gtk<\/span>::<\/span>main<\/span>();
\n}
\n}
\n<\/span>$a <\/span>=\u00a0new <\/span>Myclassw<\/span>();
\n<\/span>?>
\n<\/span>Now this time, it should work as expected. If you encounter “ERROR: No PHP-GTK2 module.”, this means that you are either running it in your web server or ran it without php-gtk2.(so\/dll) in your php.ini.<\/p>\n