See http://au2.php.net/manual/en/function.split.php for the deprecation notice.

Matches with grep -Rn [^_.]split( *

adm_config_set.php:90: $t_split = split( '=>', $value, 2 );
admin/check.php:173: $t_version = split("Zend Optimizer",$t_output);
admin/check.php:174: $t_version = split(",",$t_version[1]);
library/nusoap/class.soap_transport_http.php:1202: $data = split(';', $cookie_str);
library/nusoap/nusoap.php:3309: $data = split(';', $cookie_str);
library/adodb/adodb-datadict.inc.php:522: list(,$column_def) = split("[\t ]+",$first,2);
library/adodb/drivers/adodb-postgres64.inc.php:664: $host = split(":", $str);
library/adodb/drivers/adodb-informix72.inc.php:372: $arr = split(';',$v); //"SQLTYPE;length;precision;scale;ISNULLABLE"
library/adodb/drivers/adodb-ldap.inc.php:64: $conn_info = split( ':', $host );