Easy way to test a URL for 404 in PHP?

Easy way to test a URL for 404 in PHP?

php http validation http-headers http-status-code-404

php

Why won't my PHP app send a 404 error?

php header http-status-code-404

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How can I create an error 404 in PHP?

php redirect http-status-code-404

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Nginx - Customizing 404 page

php nginx http-status-code-404

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header('HTTP/1.0 404 Not Found'); not doing anything

php header http-status-code-404

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.htaccess redirect to 404 page RewriteRule

php .htaccess redirect http-status-code-404

php

CakePHP 2.0 - How to make custom error pages?

php cakephp http-status-code-404 cakephp-2.0

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redirect 404 to similar urls

php mysql .htaccess url-rewriting http-status-code-404

php

Ionic + Angular - How to avoid the "404 Not Found (from cache)" after POST request?

javascript php angularjs post http-status-code-404

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How do I select only the root domain from $_SERVER['HTTP_REFERER'];?

php dns http-status-code-404 http-referer

php

Getting 404 Not Found error while trying to use ErrorDocument

php apache .htaccess http-status-code-404

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How to setup a 404 page in Phalcon

php http-status-code-404 phalcon volt

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CodeIgniter 404 Page Not Found, but why?

php codeigniter routes http-status-code-404

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CodeIgniter 2.1 issue with show_404() and 404_override

codeigniter http-status-code-404 codeigniter-2 php

php

include after PHP 404 header returning "Oops! This link appears to be broken."

php include http-headers http-status-code-404

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