Php/docs/function.dbplus-find

• PHP Manual
• DB++ 函数
• Set a constraint on a relation

dbplus_find

(PHP 4 <= 4.3.0, PECL dbplus >= 0.9)

dbplus_find — Set a constraint on a relation

说明

dbplus_find ( resource $relation , array $constraints , mixed $tuple ) : int

Places a constraint on the given relation.

Further calls to functions like dbplus_curr() or dbplus_next() will only return tuples matching the given constraints.

参数

relation

A relation opened by dbplus_open().

constraints

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.

The comparison operator may be one of the following strings: '==', '>', '>=', '<', '<=', '!=', '~' for a regular expression match and 'BAND' or 'BOR' for bitwise operations.

tuple

返回值

注释

Warning 此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担。

参见

• dbplus_unselect() - Remove a constraint from relation