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这些函数的行为受 php.ini 中的设置影响。

**Sybase configuration options**
名字	默认	可修改范围	更新日志
sybase.allow_persistent	"1"	PHP_INI_ALL	PHP_INI_ALL in PHP <= 4.0.2. PHP_INI_SYSTEM in PHP <= 4.0.3.
sybase.max_persistent	"-1"	PHP_INI_ALL	PHP_INI_ALL in PHP <= 4.0.2. PHP_INI_SYSTEM in PHP <= 4.0.3.
sybase.max_links	"-1"	PHP_INI_ALL	PHP_INI_ALL in PHP <= 4.0.2. PHP_INI_SYSTEM in PHP <= 4.0.3.
sybase.interface_file	"/usr/sybase/interfaces"	PHP_INI_SYSTEM
sybase.min_error_severity	"10"	PHP_INI_ALL
sybase.min_message_severity	"10"	PHP_INI_ALL
sybase.compatability_mode	"0"	PHP_INI_ALL
magic_quotes_sybase	"0"	PHP_INI_ALL	Deprecated in PHP 5.3.0. Removed in PHP 5.4.0.

这是配置指令的简短说明。

sybase.allow_persistent boolean: Whether to allow persistent Sybase connections.
sybase.max_persistent integer: The maximum number of persistent Sybase connections per process. -1 means no limit.
sybase.max_links integer: The maximum number of Sybase connections per process, including persistent connections. -1 means no limit.
sybase.min_error_severity integer: Minimum error severity to display.
sybase.min_message_severity integer: Minimum message severity to display.
magic_quotes_sybase boolean: If magic_quotes_sybase is on, a single-quote is escaped with a single-quote instead of a backslash if magic_quotes_gpc or magic_quotes_runtime are enabled. This setting is also respected by addslashes() and stripslashes() .

Note:

Note that when magic_quotes_sybase is ON it completely overrides magic_quotes_gpc. In this case even when magic_quotes_gpc is enabled neither double quotes, backslashes or NUL's will be escaped.

Warning
本特性已自 PHP 5.3.0 起废弃并将自 PHP 5.4.0 起移除。

**Sybase-CT configuration options**
名字	默认	可修改范围	更新日志
sybct.allow_persistent	"1"	PHP_INI_SYSTEM	PHP_INI_ALL in PHP <= 4.0.2. Available since PHP 4.0.2. Removed in PHP 4.0.3.
sybct.max_persistent	"-1"	PHP_INI_SYSTEM	PHP_INI_ALL in PHP <= 4.0.2. Available since PHP 4.0.2. Removed in PHP 4.0.3.
sybct.max_links	"-1"	PHP_INI_SYSTEM	PHP_INI_ALL in PHP <= 4.0.2. Available since PHP 4.0.2. Removed in PHP 4.0.3.
sybct.min_server_severity	"10"	PHP_INI_ALL	Available since PHP 4.0.2. Removed in PHP 4.0.3.
sybct.min_client_severity	"10"	PHP_INI_ALL	Available since PHP 4.0.2. Removed in PHP 4.0.3.
sybct.hostname	NULL	PHP_INI_ALL	Available since PHP 4.0.2. Removed in PHP 4.0.3.
sybct.deadlock_retry_count	"0"	PHP_INI_ALL	Available since PHP 4.3.0.

这是配置指令的简短说明。

sybct.allow_persistent boolean: Whether to allow persistent Sybase-CT connections. The default is on.
sybct.max_persistent integer: The maximum number of persistent Sybase-CT connections per process. The default is -1 meaning unlimited.
sybct.max_links integer: The maximum number of Sybase-CT connections per process, including persistent connections. The default is -1 meaning unlimited.
sybct.min_server_severity integer: Server messages with severity greater than or equal to sybct.min_server_severity will be reported as warnings. This value can also be set from a script by calling sybase_min_server_severity() . The default is 10 which reports errors of information severity or greater.
sybct.min_client_severity integer: Client library messages with severity greater than or equal to sybct.min_client_severity will be reported as warnings. This value can also be set from a script by calling sybase_min_client_severity() . The default is 10 which effectively disables reporting.
sybct.login_timeout integer: The maximum time in seconds to wait for a connection attempt to succeed before returning failure. Note that if max_execution_time has been exceeded when a connection attempt times out, your script will be terminated before it can take action on failure. The default is one minute.
sybct.timeout integer: The maximum time in seconds to wait for a select_db or query operation to succeed before returning failure. Note that if max_execution_time has been exceeded when an operation times out, your script will be terminated before it can take action on failure. The default is no limit.
sybct.hostname string: The name of the host you claim to be connecting from, for display by sp_who. The default is none.
sybct.deadlock_retry_count int: Allows you to define how often deadlocks are to be retried. The default is 0, value -1 means "forever".

有关 PHP_INI_* 样式的更多详情与定义，见配置可被设定范围。