dba_exists

(PHP 4, PHP 5, PHP 7)

dba_exists — Check whether key exists

说明

dba_exists ( string $key , resource $handle ) : bool

dba_exists() checks whether the specified key exists in the database.

参数

key

The key the check is performed for.

handle

The database handler, returned by dba_open() or dba_popen().

返回值

Returns TRUE if the key exists, FALSE otherwise.

参见

相关文章
php cubrid 函数 check whether the instance pointed by oid existsphp dba 函数 delete dba entry specified by keyphp dba 函数 check whether key existsphp dba 函数 fetch data specified by keyphp dba 函数 fetch first keyphp dba 函数 splits a key in string representation into array representationphp dba 函数 fetch next keyphp dba 函数 open databasephp enchant 函数 whether a dictionary exists or not. using non empty tagphp enchant 函数 check whether a word is correctly spelled or notphp enchant 函数 whether or not word exists in this spelling sessionphp enchant 函数 check the word is correctly spelled and provide suggestionsphp gupnp 函数 check whether root device is availablephp gupnp 函数 check whether subscription is valid to the servicephp intl 函数 check whether the given error code indicates failurephp 数组 函数 别名 array key existsphp semaphore 函数 check whether a message queue existsphp ncurses 函数 check for presence of a function key on terminal keyboardphp semaphore 函数 check whether a specific entry existsphp yaf registry check whether an item exists
关注编程学问公众号