3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a=unserialize('a:1:{i:0;a:2:{s:11:"institut_id";s:9:"870500001";s:4:"name";s:12:"SPK Chemnitz";}}'); $a[] = array('institut_id'=>"870520001",'name'=>'SPK Mittelsachsen'); print serialize($a);
based on NRNvt
Output for 5.3.19 - 7.2.0
a:2:{i:0;a:2:{s:11:"institut_id";s:9:"870500001";s:4:"name";s:12:"SPK Chemnitz";}i:1;a:2:{s:11:"institut_id";s:9:"870520001";s:4:"name";s:17:"SPK Mittelsachsen";}}