PHP error_log function

error_log

(PHP 3, PHP 4, PHP 5)

error_log -- Send an error message somewhereDescriptionbool error_log ( string message [, int message_type [, string destination [, string extra_headers]]] )

Sends an error message to the web server's error log, a
TCP port or to a file.

Parameters

message

The error message that should be logged.

message_type

Says where the error should go. The possible message types are as
follows:

Table 1. error_log() log types

0 message is sent to PHP's system logger, using
the Operating System's system logging mechanism or a file, depending
on what the error_log
configuration directive is set to. This is the default option.
1 message is sent by email to the address in
the destination parameter. This is the only
message type where the fourth parameter,
extra_headers is used.
2 message is sent through the PHP debugging
connection. This option is only available if remote debugging has
been enabled. In this case, the
destination parameter specifies the host name
or IP address and optionally, port number, of the socket receiving
the debug information. This option is only available in PHP 3.
3 message is appended to the file
destination. A newline is not automatically
added to the end of the message string.

destination

The destination. Its meaning depends on the
message_type parameter as described above.

extra_headers

The extra headers. It's used when the message_type
parameter is set to 1.
This message type uses the same internal function as
mail() does.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example 1. error_log() examples

// Send notification through the server log if we can not
// connect to the database.
if (!Ora_Logon($username, $password)) {
error_log("Oracle database not available!", 0);
}

// Notify administrator by email if we run out of FOO
if (!($foo = allocate_new_foo())) {
error_log("Big trouble, we're all out of FOOs!", 1,
"operator@example.com");
}

// other ways of calling error_log():
error_log("You messed up!", 2, "127.0.0.1:7000");
error_log("You messed up!", 2, "loghost");
error_log("You messed up!", 3, "/var/tmp/my-errors.log");