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error_log (PHP 3, PHP 4, PHP 5) error_log -- Send an error message somewhere Descriptionbool 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.
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- destination
The destination. Its meaning depends on the
message parameter as described above.
- extra_headers
The extra headers. It's used when the message
parameter is set to 1.
This message type uses the same internal function as
mail() does.
Examples
Example 1. error_log() examples
<?php
// 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");
?>
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