PHP Reference
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Quick Reference

The PHP error_log() function sends an error message to a log, to a file, or to a mail account.

<?php
// send email to admin if we run out of ink
if (!($foo = allocate_new_foo())) {
    error_log('The printer is out of ink', 1, 'admin@example.com');
}
?>

Output

// sends appropriate error messages to the mail server or admmin

Syntax

error_log(message, type, destination, headers)

Parameters

ParameterDescription
messageSpecifies the error message to log (required)
typeSpecifies where the error message should go:

  • 0 - Message is sent to PHP's system logger, using the OS' system logging mechanism or a file, depending on what the error_log configuration is set to in php.ini (default)

  • 1 - Message is sent by email to the address in the destination parameter

  • 3 - Message is appended to the file specified in destination

  • 4 - Message is sent directly to the SAPI logging handler
destinationSpecifies the destination of the error message
headersSpecifies additional headers, like From, Cc, and Bcc. Multiple headers should be separated with a CRLF (\r\n) (only used if the type parameter is set to 1)

PHP Notes:

  • When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
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