There is script. Replace sdczal in odbc_connect with any ODBC alias and PLC_CLHPRESS with any table from alias.

<?php

$db = odbc_connect("sdczal", "", "");

while(1){
$res = odbc_exec($db, "select * from PLC_CLHPRESS;");

};

odbc_close($db);
?>

There is related directives from php.ini:
max_execution_time = 10     ; Maximum execution time of each script, in seconds
memory_limit = 50M      ; Maximum amount of memory a script may consume (8MB)

When execution time exceed PHP crash with Access violation.