Shiping_method_chronorelais

Hello,

I’m trying to export my orders for adding them to OPENSI and I need a code that I get with the field _shipping_method_chronorelais, but I get too much data with this field like this :
“a:8:{s:2:””id””;s:5:””8065O””;s:4:””type””;s:1:””P””;s:4:””name””;s:26:””La Poste De Rennes Le Gast””;s:7:””address””;s:17:””27 Rue D Erlangen””;s:8:””postcode””;s:5:””35700″”;s:4:””city””;s:6:””Rennes””;s:7:””country””;s:2:””FR””;s:14:””google_map_url””;s:58:””https://maps.google.fr/maps?q=48.13099300000,-1.65866500000″”;}””

Is there a way that i can only get just a part of it like in my case 80650 ?

Thanks in advance