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ini_set

(PHP 4 )

ini_set -- Sets the value of a configuration option

Description

string ini_set ( string varname, string newvalue)

Sets the value of the given configuration option. Returns the old value on success, FALSE on failure. The configuration option will keep this new value during the script's execution, and will be restored at the script's ending.

Not all the available options can be changed using ini_set(). Below is a table with a list of all PHP options (as of PHP 4.2.0), indicating which ones can be changed/set and at what level.

Table 1. Configuration options

NameDefaultChangeable
com.allow_dcom"0"PHP_INI_SYSTEM
com.autoregister_typelib"0"PHP_INI_SYSTEM
com.autoregister_verbose"0"PHP_INI_SYSTEM
com.autoregister_casesensitive"1"PHP_INI_SYSTEM
com.typelib_file""PHP_INI_SYSTEM
crack.default_dictionaryNULLPHP_INI_SYSTEM
exif.encode_unicode"ISO-8859-15"PHP_INI_ALL
exif.decode_unicode_motorola"UCS-2BE"PHP_INI_ALL
exif.decode_unicode_intel"UCS-2LE"PHP_INI_ALL
exif.encode_jis""PHP_INI_ALL
exif.decode_jis_motorola"JIS"PHP_INI_ALL
exif.decode_jis_intel"JIS"PHP_INI_ALL
fbsql.allow_persistent"1"PHP_INI_SYSTEM
fbsql.generate_warnings"0"PHP_INI_SYSTEM
fbsql.autocommit"1"PHP_INI_SYSTEM
fbsql.max_persistent"-1"PHP_INI_SYSTEM
fbsql.max_links"128"PHP_INI_SYSTEM
fbsql.max_connections"128"PHP_INI_SYSTEM
fbsql.max_results"128"PHP_INI_SYSTEM
fbsql.batchSize"1000"PHP_INI_SYSTEM
fbsql.default_hostNULLPHP_INI_SYSTEM
fbsql.default_user"_SYSTEM"PHP_INI_SYSTEM
fbsql.default_password""PHP_INI_SYSTEM
fbsql.default_database""PHP_INI_SYSTEM
fbsql.default_database_password""PHP_INI_SYSTEM
hwapi.allow_persistent"0"PHP_INI_SYSTEM
hyperwave.allow_persistent"0"PHP_INI_SYSTEM
hyperwave.default_port"418"PHP_INI_ALL
iconv.input_encodingICONV_INPUT_ENCODINGPHP_INI_ALL
iconv.output_encodingICONV_OUTPUT_ENCODINGPHP_INI_ALL
iconv.internal_encodingICONV_INTERNAL_ENCODINGPHP_INI_ALL
ifx.allow_persistent"1"PHP_INI_SYSTEM
ifx.max_persistent"-1"PHP_INI_SYSTEM
ifx.max_links"-1"PHP_INI_SYSTEM
ifx.default_hostNULLPHP_INI_SYSTEM
ifx.default_userNULLPHP_INI_SYSTEM
ifx.default_passwordNULLPHP_INI_SYSTEM
ifx.blobinfile"1"PHP_INI_ALL
ifx.textasvarchar"0"PHP_INI_ALL
ifx.byteasvarchar"0"PHP_INI_ALL
ifx.charasvarchar"0"PHP_INI_ALL
ifx.nullformat"0"PHP_INI_ALL
ingres.allow_persistent"1"PHP_INI_SYSTEM
ingres.max_persistent"-1"PHP_INI_SYSTEM
ingres.max_links"-1"PHP_INI_SYSTEM
ingres.default_databaseNULLPHP_INI_ALL
ingres.default_userNULLPHP_INI_ALL
ingres.default_passwordNULLPHP_INI_ALL
ibase.allow_persistent"1"PHP_INI_SYSTEM
ibase.max_persistent"-1"PHP_INI_SYSTEM
ibase.max_links"-1"PHP_INI_SYSTEM
ibase.default_userNULLPHP_INI_ALL
ibase.default_passwordNULLPHP_INI_ALL
ibase.timestampformat"%m/%d/%Y%H:%M:%S"PHP_INI_ALL
ibase.dateformat"%m/%d/%Y"PHP_INI_ALL
ibase.timeformat"%H:%M:%S"PHP_INI_ALL
java.class.pathNULLPHP_INI_ALL
java.homeNULLPHP_INI_ALL
java.library.pathNULLPHP_INI_ALL
java.libraryJAVALIBPHP_INI_ALL
java.libraryNULLPHP_INI_ALL
ldap.max_links"-1"PHP_INI_SYSTEM
mbstring.detect_orderNULLPHP_INI_ALL
mbstring.http_inputNULLPHP_INI_ALL
mbstring.http_outputNULLPHP_INI_ALL
mbstring.internal_encodingNULLPHP_INI_ALL
mbstring.substitute_characterNULLPHP_INI_ALL
mbstring.func_overload"0"PHP_INI_SYSTEM
mcrypt.algorithms_dirNULLPHP_INI_ALL
mcrypt.modes_dirNULLPHP_INI_ALL
mime_magic.magicfile"/usr/share/misc/magic.mime"PHP_INI_SYSTEM
mssql.allow_persistent"1"PHP_INI_SYSTEM
mssql.max_persistent"-1"PHP_INI_SYSTEM
mssql.max_links"-1"PHP_INI_SYSTEM
mssql.max_procs"25"PHP_INI_ALL
mssql.min_error_severity"10"PHP_INI_ALL
mssql.min_message_severity"10"PHP_INI_ALL
mssql.compatability_mode"0"PHP_INI_ALL
mssql.connect_timeout"5"PHP_INI_ALL
mssql.timeout"60"PHP_INI_ALL
mssql.textsize"-1"PHP_INI_ALL
mssql.textlimit"-1"PHP_INI_ALL
mssql.batchsize"0"PHP_INI_ALL
mssql.datetimeconvert"1"PHP_INI_ALL
mssql.secure_connection"0"PHP_INI_SYSTEM
mysql.allow_persistent"1"PHP_INI_SYSTEM
mysql.max_persistent"-1"PHP_INI_SYSTEM
mysql.max_links"-1"PHP_INI_SYSTEM
mysql.default_hostNULLPHP_INI_ALL
mysql.default_userNULLPHP_INI_ALL
mysql.default_passwordNULLPHP_INI_ALL
mysql.default_portNULLPHP_INI_ALL
mysql.default_socketNULLPHP_INI_ALL
ncurses.value"42"PHP_INI_ALL
ncurses.string"foobar"PHP_INI_ALL
odbc.allow_persistent"1"PHP_INI_SYSTEM
odbc.max_persistent"-1"PHP_INI_SYSTEM
odbc.max_links"-1"PHP_INI_SYSTEM
odbc.default_dbNULLPHP_INI_ALL
odbc.default_userNULLPHP_INI_ALL
odbc.default_pwNULLPHP_INI_ALL
odbc.defaultlrl"4096"PHP_INI_ALL
odbc.defaultbinmode"1"PHP_INI_ALL
odbc.check_persistent"1"PHP_INI_SYSTEM
pfpro.defaulthost"test.signio.com" 
pfpro.defaulthost"test-payflow.verisign.com" 
pfpro.defaultport"443"PHP_INI_ALL
pfpro.defaulttimeout"30"PHP_INI_ALL
pfpro.proxyaddress""PHP_INI_ALL
pfpro.proxyport""PHP_INI_ALL
pfpro.proxylogon""PHP_INI_ALL
pfpro.proxypassword""PHP_INI_ALL
pgsql.allow_persistent"1"PHP_INI_SYSTEM
pgsql.max_persistent"-1"PHP_INI_SYSTEM
pgsql.max_links"-1"PHP_INI_SYSTEM
pgsql.auto_reset_persistent"0"PHP_INI_SYSTEM
pgsql.ignore_notice"0"PHP_INI_ALL
pgsql.log_notice"0"PHP_INI_ALL
session.save_path"/tmp"PHP_INI_ALL
session.name"PHPSESSID"PHP_INI_ALL
session.save_handler"files"PHP_INI_ALL
session.auto_start"0"PHP_INI_ALL
session.gc_probability"1"PHP_INI_ALL
session.gc_maxlifetime"1440"PHP_INI_ALL
session.serialize_handler"php"PHP_INI_ALL
session.cookie_lifetime"0"PHP_INI_ALL
session.cookie_path"/"PHP_INI_ALL
session.cookie_domain""PHP_INI_ALL
session.cookie_secure""PHP_INI_ALL
session.use_cookies"1"PHP_INI_ALL
session.use_only_cookies"0"PHP_INI_ALL
session.referer_check""PHP_INI_ALL
session.entropy_file""PHP_INI_ALL
session.entropy_length"0"PHP_INI_ALL
session.cache_limiter"nocache"PHP_INI_ALL
session.cache_expire"180"PHP_INI_ALL
session.use_trans_sid"0"PHP_INI_SYSTEM|PHP_INI_PERDIR
session.encode_sources"globals,track"PHP_INI_ALL
assert.active"1"PHP_INI_ALL
assert.bail"0"PHP_INI_ALL
assert.warning"1"PHP_INI_ALL
assert.callbackNULLPHP_INI_ALL
assert.quiet_eval"0"PHP_INI_ALL
safe_mode_protected_env_varsSAFE_MODE_PROTECTED_ENV_VARSPHP_INI_SYSTEM
safe_mode_allowed_env_varsSAFE_MODE_ALLOWED_ENV_VARSPHP_INI_SYSTEM
url_rewriter.tags"a=href,area=href,frame=src,form=fakeentry"PHP_INI_ALL
sybct.allow_persistent"1"PHP_INI_SYSTEM
sybct.max_persistent"-1"PHP_INI_SYSTEM
sybct.max_links"-1"PHP_INI_SYSTEM
sybct.min_server_severity"10"PHP_INI_ALL
sybct.min_client_severity"10"PHP_INI_ALL
sybct.hostnameNULLPHP_INI_ALL
vpopmail.directory""PHP_INI_ALL
zlib.output_compression"0"PHP_INI_SYSTEM|PHP_INI_PERDIR
zlib.output_compression_level"-1"PHP_INI_ALL
define_syslog_variables"0"PHP_INI_ALL
highlight.bgHL_BG_COLORPHP_INI_ALL
highlight.commentHL_COMMENT_COLORPHP_INI_ALL
highlight.defaultHL_DEFAULT_COLORPHP_INI_ALL
highlight.htmlHL_HTML_COLORPHP_INI_ALL
highlight.keywordHL_KEYWORD_COLORPHP_INI_ALL
highlight.stringHL_STRING_COLORPHP_INI_ALL
allow_call_time_pass_reference"1"PHP_INI_SYSTEM|PHP_INI_PERDIR
asp_tags"0"PHP_INI_SYSTEM|PHP_INI_PERDIR
display_errors"1"PHP_INI_ALL
display_startup_errors"0"PHP_INI_ALL
enable_dl"1"PHP_INI_SYSTEM
expose_php"1"PHP_INI_SYSTEM
html_errors"1"PHP_INI_SYSTEM
xmlrpc_errors"0"PHP_INI_SYSTEM
xmlrpc_error_number"0"PHP_INI_ALL
ignore_user_abort"0"PHP_INI_ALL
implicit_flush"0"PHP_INI_PERDIR|PHP_INI_SYSTEM
log_errors"0"PHP_INI_ALL
log_errors_max_len"1024"PHP_INI_ALL
ignore_repeated_errors"0"PHP_INI_ALL
ignore_repeated_source"0"PHP_INI_ALL
magic_quotes_gpc"1"PHP_INI_PERDIR|PHP_INI_SYSTEM
magic_quotes_runtime"0"PHP_INI_ALL
magic_quotes_sybase"0"PHP_INI_ALL
output_buffering"0"PHP_INI_PERDIR|PHP_INI_SYSTEM
output_handlerNULLPHP_INI_PERDIR|PHP_INI_SYSTEM
register_argc_argv"1"PHP_INI_PERDIR|PHP_INI_SYSTEM
register_globals"0"PHP_INI_PERDIR|PHP_INI_SYSTEM
safe_mode"1"PHP_INI_SYSTEM
safe_mode"0"PHP_INI_SYSTEM
safe_mode_include_dirNULLPHP_INI_SYSTEM
safe_mode_gid"0"PHP_INI_SYSTEM
short_open_tagDEFAULT_SHORT_OPEN_TAGPHP_INI_SYSTEM|PHP_INI_PERDIR
sql.safe_mode"0"PHP_INI_SYSTEM
track_errors"0"PHP_INI_ALL
y2k_compliance"0"PHP_INI_ALL
unserialize_callback_funcNULLPHP_INI_ALL
arg_separator.output"&"PHP_INI_ALL
arg_separator.input"&"PHP_INI_SYSTEM|PHP_INI_PERDIR
auto_append_fileNULLPHP_INI_SYSTEM|PHP_INI_PERDIR
auto_prepend_fileNULLPHP_INI_SYSTEM|PHP_INI_PERDIR
doc_rootNULLPHP_INI_SYSTEM
default_charsetSAPI_DEFAULT_CHARSETPHP_INI_ALL
default_mimetypeSAPI_DEFAULT_MIMETYPEPHP_INI_ALL
error_logNULLPHP_INI_ALL
extension_dirPHP_EXTENSION_DIRPHP_INI_SYSTEM
gpc_order"GPC"PHP_INI_ALL
include_pathPHP_INCLUDE_PATHPHP_INI_ALL
max_execution_time"30"PHP_INI_ALL
open_basedirNULLPHP_INI_SYSTEM
safe_mode_exec_dir"1"PHP_INI_SYSTEM
upload_max_filesize"2M"PHP_INI_SYSTEM
file_uploads"1"PHP_INI_SYSTEM
post_max_size"8M"PHP_INI_SYSTEM
upload_tmp_dirNULLPHP_INI_SYSTEM
user_dirNULLPHP_INI_SYSTEM
variables_orderNULLPHP_INI_ALL
error_append_stringNULLPHP_INI_ALL
error_prepend_stringNULLPHP_INI_ALL
SMTP"localhost"PHP_INI_ALL
smtp_port25PHP_INI_ALL
browscapNULLPHP_INI_SYSTEM
error_reportingNULLPHP_INI_ALL
memory_limit"8M"PHP_INI_ALL
precision"14"PHP_INI_ALL
sendmail_fromNULLPHP_INI_ALL
sendmail_pathDEFAULT_SENDMAIL_PATHPHP_INI_SYSTEM
disable_functions""PHP_INI_SYSTEM
allow_url_fopen"1"PHP_INI_ALL
always_populate_raw_post_data"0"PHP_INI_ALL
xbithack"0"PHP_INI_ALL
engine"1"PHP_INI_ALL
last_modified"0"PHP_INI_ALL
child_terminate"0"PHP_INI_ALL
async_send"0"PHP_INI_ALL

Table 2. Definition of PHP_INI_* constants

ConstantValueMeaning
PHP_INI_USER1Entry can be set in user scripts
PHP_INI_PERDIR2 Entry can be set in php.ini, .htaccess or httpd.conf
PHP_INI_SYSTEM4 Entry can be set in php.ini or httpd.conf
PHP_INI_ALL7Entry can be set anywhere

See also: get_cfg_var(), ini_get(), ini_get_all(), and ini_restore()


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