PHP Manual . ... PHP 4 >= 4.1.0) dbplus_find -- Set a constraint on a relation . int dbplus_find ( resource relation, array constraints, mixed tuple) . ... Constraints are triplets of strings containing of a domain name, a comparison operator and a comparison value. The constraints parameter array may consist of a collection of string arrays, each of which contains a domain, an operator and a value, or of a single string array containing a multiple of three elements. ...