$php_errormsg — The previous error message
$php_errormsg is a variable containing the text of the last error message generated by PHP. This variable will only be available within the scope in which the error occurred, and only if the track_errors configuration option is turned on (it defaults to off).
Замечание: This variable is only available when track_errors is enabled in php.ini.
If a user defined error handler (set_error_handler()) is set $php_errormsg is only set if the error handler returns FALSE
Пример #1 $php_errormsg example
<?php
@strpos();
echo $php_errormsg;
?>
Результатом выполнения данного примера будет что-то подобное:
Wrong parameter count for strpos()