Serialised data (WordPress)
Versie door Jeroen Strompf (overleg | bijdragen) op 19 okt 2020 om 17:24 (→Serialize & unserialize)
Soms bevatten database-velden serialised data: Georganiseerd middels syntaxis, worden meerdere gegevens in één veld opgeslagen.
Serialize & unserialize
WordPress gebruikt de functie serialize()
om data te serializen voor opslag in de database, en de functie unserialize
voor de tegenovergestelde bewerking.
Voorbeeld [1]:
$serialized = 'a:3:{i:0;s:5:"apple";i:1;s:6:"banana";i:2;s:6:"orange";}'; var_dump(unserialize($serialized)); Output: Array ( [0] => apple [1] => banana [2] => orange )
Hieraan kun je ook al een deel van de syntaxis achterhalen:
- Data-elementen omhuld door
{
en}
a
: Arrayi
: Counter; indexs
: String. De lengte van de string wordt meegegeven. Bv.s:5"apple"
. Als dit getal niet klopt, werktunserialize
niet!
Voorbeeld
In tabel wp_options
wordt in het veld widget_woocommerce_layered_nav
alle Woocommerce-widgets gecodeerd. Dit is een voorbeeld van een webwinkel in okt. 2020.
Rauwe inhoud:
a:14:{i:4;a:4:{s:5:"title";s:21:"Originele priri";s:9:"attribute";s:21:"originele priri";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:5;a:4:{s:5:"title";s:12:"Breedte (mm)";s:9:"attribute";s:7:"breedte";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:6;a:4:{s:5:"title";s:11:"Diepte (mm)";s:9:"attribute";s:6:"diepte";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:7;a:4:{s:5:"title";s:11:"Lengte (mm)";s:9:"attribute";s:6:"lengte";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:8;a:4:{s:5:"title";s:18:"Automatische stop?";s:9:"attribute";s:17:"automatische_stop";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:9;a:4:{s:5:"title";s:12:"Stroomdraad?";s:9:"attribute";s:11:"stroomdraad";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:10;a:4:{s:5:"title";s:10:"Connector?";s:9:"attribute";s:9:"connector";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:11;a:4:{s:5:"title";s:5:"Veer?";s:9:"attribute";s:4:"veer";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:12;a:4:{s:5:"title";s:7:"Diagram";s:9:"attribute";s:7:"diagram";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:13;a:4:{s:5:"title";s:19:"Ztoepassing - Model";s:9:"attribute";s:16:"toepassing_model";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:14;a:4:{s:5:"title";s:21:"Toepassing - Submodel";s:9:"attribute";s:19:"toepassing_submodel";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:15;a:4:{s:5:"title";s:17:"Asein-productcode";s:9:"attribute";s:10:"asein_code";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}i:16;a:4:{s:5:"title";s:11:"Productlijn";s:9:"attribute";s:11:"productlijn";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and";}s:12:"_multiwidget";i:1;}
In iets meer leesbare vorm:
a:14: { i:4;a:4: { s:5:"title"; s:21:"Originele pripripripr"; s:9:"attribute"; s:21:"originele pripripripr"; s:12:"display_type"; s:4:"list"; s:10:"query_type"; s:3:"and"; } i:5;a:4: { s:5:"title";s:12:"Breedte (mm)";s:9:"attribute";s:7:"breedte";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:6;a:4: { s:5:"title";s:11:"Diepte (mm)";s:9:"attribute";s:6:"diepte";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:7;a:4: { s:5:"title";s:11:"Lengte (mm)";s:9:"attribute";s:6:"lengte";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:8;a:4: { s:5:"title";s:18:"Automatische stop?";s:9:"attribute";s:17:"automatische_stop";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:9;a:4: { s:5:"title";s:12:"Stroomdraad?";s:9:"attribute";s:11:"stroomdraad";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:10;a:4: { s:5:"title";s:10:"Connector?";s:9:"attribute";s:9:"connector";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:11;a:4: { s:5:"title";s:5:"Veer?";s:9:"attribute";s:4:"veer";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:12;a:4: { s:5:"title";s:7:"Diagram";s:9:"attribute";s:7:"diagram";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:13;a:4: { s:5:"title";s:19:"Ztoepassing - Model";s:9:"attribute";s:16:"toepassing_model";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:14;a:4: { s:5:"title";s:21:"Toepassing - Submodel";s:9:"attribute";s:19:"toepassing_submodel";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:15;a:4: { s:5:"title";s:17:"Asein-productcode";s:9:"attribute";s:10:"asein_code";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } i:16;a:4: { s:5:"title";s:11:"Productlijn";s:9:"attribute";s:11:"productlijn";s:12:"display_type";s:4:"list";s:10:"query_type";s:3:"and"; } s:12:"_multiwidget";i:1; }