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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PECL mysqlnd_qc >= 1.1.0)
mysqlnd_qc_set_cache_condition — Set conditions for automatic caching
$condition_type
, mixed $condition
, mixed $condition_option
)Sets a condition for automatic caching of statements which do not contain the necessary SQL hints to enable caching of them.
condition_type
Type of the condition. The only allowed value is
MYSQLND_QC_CONDITION_META_SCHEMA_PATTERN
.
condition
Parameter for the condition set with condition_type. Parameter type and structure depend on condition_type
If condition_type equals MYSQLND_QC_CONDITION_META_SCHEMA_PATTERN condition must be a string. The string sets a pattern. Statements are cached if table and database meta data entry of their result sets match the pattern. The pattern is checked for a match with the db and org_table meta data entries provided by the underlying MySQL client server library. Please, check the MySQL Reference manual for details about the two entries. The db and org_table values are concatenated with a dot (.) before matched against condition. Pattern matching supports the wildcards % and _. The wildcard % will match one or many arbitrary characters. _ will match one arbitrary character. The escape symbol is backslash.
condition_option
Option for condition. Type and structure depend on condition_type.
If condition_type equals MYSQLND_QC_CONDITION_META_SCHEMA_PATTERN condition_options is the TTL to be used.
Example #1 mysqlnd_qc_set_cache_condition() example
<?php
if (! mysqlnd_qc_set_cache_condition ( MYSQLND_QC_CONDITION_META_SCHEMA_PATTERN , "db_example.new%" , 1 )) {
die( "Failed to set cache condition!" );
}
$mysqli = new mysqli ( "host" , "user" , "password" , "db_example" , "port" );
$mysqli -> query ( "SELECT id, title FROM news" );
$pdo_mysql = new PDO ( "mysql:host=host;dbname=db_example;port=port" , "user" , "password" );
$pdo_mysql -> query ( "SELECT id, title FROM latest_news" );
$pdo_mysql -> query ( "SELECT id, title FROM news" );
?>
Returns TRUE on success or FALSE on FAILURE.