# dbplus_find

(PHP 4 <= 4.1.0, 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