如何创建未匹配其他规则的.htaccess规则并在PHP中捕获

Hey Marco, let's get this sorted so invalid URLs keep users on your discography page instead of bouncing them elsewhere. Here's what you need to do:

Step 1: Update Your .htaccess Rules #

The key here is to put your catch-all rule LAST—Apache processes RewriteRules from top to bottom, so if you put the catch-all first, it'll override your valid rules. We'll add a rule that catches any invalid discography/ paths that don't match your existing patterns, and pass a flag to PHP so you can handle it.

Here's the updated .htaccess code:

ErrorDocument 404 /notfound.php

# Valid discography root
RewriteRule ^discography/?$ music/music.php [L,QSA]

# Valid country filter
RewriteRule ^discography/country/(\d+)(?:/[^/]+)?/?$ music/music.php?country=$1 [L,QSA]

# Valid format filter
RewriteRule ^discography/format/(\d+)(?:/[^/]+)?/?$ music/music.php?format=$1 [L,QSA]

# Valid year filter
RewriteRule ^discography/year/([0-9]{4})/?$ music/music.php?year=$1 [L,QSA]

# Catch-all for invalid discography paths
RewriteRule ^discography/.+$ music/music.php?invalid_request=1 [L,QSA]

• The ^discography/.+$ pattern matches any URL starting with discography/ followed by one or more characters (so it doesn't conflict with your root /discography rule).
• We add invalid_request=1 as a query parameter so PHP can easily detect this case.

Step 2: Adjust Your PHP Logic #

Now update your PHP script to handle the invalid request case, keeping users on the page and showing your custom message/options. Here's the modified code:

if (isset($_GET['country']) && is_numeric($_GET['country'])) {
    echo 'country id';
    $get_countryid = (int)$_GET['country'];
} elseif (isset($_GET['format']) && is_numeric($_GET['format'])) {
    echo 'format id';
    $get_formatid = (int)$_GET['format'];
} elseif (isset($_GET['year']) && is_numeric($_GET['year'])) {
    echo 'year';
    $get_year = (int)$_GET['year'];
} elseif (isset($_GET['invalid_request'])) {
    // Handle invalid URL case: keep user on page, show options
    echo 'Oops, that URL isn’t valid! Please choose a filter from the options below.';
    // Add your navigation/filter options here (like country, format, year selectors)
} else {
    // Default discography page
    echo 'http://www.example.com/discography';
}

Why Your Earlier Attempt Failed #

If you put the catch-all rule before your valid ones, Apache would match it first (since .* matches almost everything) and skip your intended rules. By placing it last, we ensure only URLs that don't fit your valid patterns trigger the catch-all.

内容的提问来源于stack exchange，提问作者Marco