Assuming you only copy/pasted the relevant code and your form includes <form method=”POST”> If _POST is not set the filename variable won’t be either in the above example. An alternative way: In this example filename is set regardless of the situation with _POST. This should demonstrate the use of isset nicely. More information here: http://php.net/manual/en/function.isset.php
I have set up PHP, MySQL, and Apache. localhost() for PHP and it is working well. But after I downloaded MySQL, it reports: Fatal error: Call to undefined function mysql_connect() How can I fix this?
No output before sending headers! Functions that send/modify HTTP headers must be invoked before any output is made. summary ⇊ Otherwise the call fails: Warning: Cannot modify header information – headers already sent (output started at script:line) Some functions modifying the HTTP header are: header / header_remove session_start / session_regenerate_id setcookie / setrawcookie Output can … Read more
The $GLOBALS array can be used instead: From the Manual: An associative array containing references to all variables which are currently defined in the global scope of the script. The variable names are the keys of the array. If you have a set of functions that need some common variables, a class with properties may … Read more
Simply use str_replace: You would do this after your previous substr and strtolower calls, like so: If you want to get fancy, though, you can do it in one line:
You can use the strpos() function which is used to find the occurrence of one string inside another one: Note that the use of !== false is deliberate (neither != false nor === true will return the desired result); strpos() returns either the offset at which the needle string begins in the haystack string, or … Read more
You can use a link to invoke history.go(-1) in Javascript, which is essentially equivalent to clicking the Back button. Ideally, however, it’d be better to just create a link back to the URL from whence the user was posted to the form – that way the proper “flow” of history is preserved and the user … Read more
This is my solution: hope it works!
I have set up PHP, MySQL, and Apache. localhost() for PHP and it is working well. But after I downloaded MySQL, it reports: Fatal error: Call to undefined function mysql_connect() How can I fix this?
It’s possible using PHP’s mail() function. Remember the mail function will not work on a local server. Reference: mail