error_log
Send an error message to the defined error handling routines
Syntax
error_log ( string $message [, int $message_type = 0 [, string $destination [, string $extra_headers ]]] ) : bool
Parameters
message
The error message that should be logged.
message_type
Says where the error should go. The possible message types are as follows:
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 | No longer an option. |
3 | message is appended to the file destination. A newline is not automatically added to the end of the message string. |
4 | message is sent directly to the SAPI logging handler. |
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
Returns TRUE on success or FALSE on failure.
Examples
message
<? $message = "message"; $return = error_log($message); var_export($return); ?>
true
message_type | 0
<? $message = "message"; $message_type = 0; $return = error_log($message, $message_type); var_export($return); ?>
true
message_type | 1 | destination
<? $message = "message"; $message_type = 1; $destination = "myemail@mydomain.com"; $return = error_log($message, $message_type, $destination); var_export($return); ?>
true
message_type | 1 | extra_headers
<? $message = "message"; $message_type = 1; $destination = "myemail@mydomain.com"; $extra_headers = "extra_headers"; $return = error_log($message, $message_type, $destination, $extra_headers); var_export($return); ?>
true
message_type | 3
<? $message = "message"; $message_type = 3; $destination = "/tmp/myerror.log"; $return = error_log($message, $message_type, $destination); var_export($return); ?>
true
message_type | 4
<? $message = "message"; $message_type = 4; $return = error_log($message, $message_type); var_export($return); ?>
true
destination
<? $message = "message"; $message_type = 1; $destination = "myemail@mydomain.com"; $return = error_log($message, $message_type, $destination); var_export($return); ?>
true
extra_headers
<? $message = "message"; $message_type = 1; $destination = "myemail@mydomain.com"; $extra_headers = "extra_headers"; $return = error_log($message, $message_type, $destination, $extra_headers); var_export($return); ?>
true