PHP validate URI

user_9300428 0
Viewed 166

I want to validate a URI (not URL only) in PHP, though couldn't find any way to do this.

PHP does have parse_url() but it is not for URIs, it would be helpful to find a proper way to validate URI structures such as the following:

content://com.example.provider/articles/?optional=queries
php
3 Answers

To validate URIs, you can use the FILTER_VALIDATE_URL filter with the filter_var() function in PHP.

$uri = "content://com.example.provider/articles/?optional=queries"

if (filter_var($uri, FILTER_VALIDATE_URL)) {
    // Valid URI, do something here.
}
user_89820340

You can try the code below:

$url = "http://www.google.com";
if (!filter_var($url, FILTER_VALIDATE_URL) === false) {
    echo("$url is a valid URL");
} else {
    echo("$url is not a valid URL");
}
user_95015380

Needs to filter as well to remove illegal characters.

$url = "http://www.google.com"; 
// Remove all illegal characters from a url
$url = filter_var($url, FILTER_SANITIZE_URL);

// Validate url
if (filter_var($url, FILTER_VALIDATE_URL)) {
    echo("$url is a valid URL");
} else {
    echo("$url is not a valid URL");
}

Here, the URL is required to have a query string to be valid:

$url = "https://www.w3schools.com";

if (filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_QUERY_REQUIRED)) {
    echo("$url is a valid URL");
} else {
    echo("$url is not a valid URL");
}
user_96619480
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