/wayback-availability.php
Created Sep 15, 2019
Find Wayback Machine snapshots easily - Use the Wayback Machine API to quickly find the most recent snapshot for a url. https://www.damiencarbery.com/2019/09/find-wayback-machine-snapshots-easily/
| <!DOCTYPE html> | |
| <!-- | |
| Find Wayback Machine snapshots easily | |
| Use the Wayback Machine API to quickly find the most recent snapshot for a url. | |
| https://www.damiencarbery.com/2019/09/find-wayback-machine-snapshots-easily/ | |
| --> | |
| <html lang="en-US"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title>Wayback Availability</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1" /> | |
| <style> | |
| /* Some styles from inspired by the old http://www.blueprintcss.org/ framework. */ | |
| table { border-collapse: collapse; border-spacing: 0; } | |
| table, th, td {vertical-align: middle;} | |
| thead th { background: #c3d9ff; font-weight: bold; } | |
| th, td { border: 1px solid #444; padding: 4px 10px 4px 5px; text-align: left; } | |
| tbody tr:nth-child(even) td, tbody tr.even td { background-color: #e5ecf9; } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>Wayback Availability</h1> | |
| <table><thead><tr><th>URL</th><th>Snapshot</th><th>Snapshot Date</th></tr></thead> | |
| <tbody> | |
| <?php | |
| define('WP_USE_THEMES', false); | |
| /** Loads the WordPress Environment and Template */ | |
| require( dirname( __FILE__ ) . '/wp-blog-header.php' ); | |
| $urls_to_check = array( | |
| 'https://www.damiencarbery.com', | |
| 'https://www.damiencarbery.com/blah', | |
| ); | |
| $site_url = 'https://www.damiencarbery.com'; | |
| $wayback_availability_url = 'https://archive.org/wayback/available?url='; | |
| foreach ( $urls_to_check as $site_url ) { | |
| $response = wp_remote_get( $wayback_availability_url . $site_url ); | |
| $http_code = wp_remote_retrieve_response_code( $response ); | |
| // First we check that the Wayback Availability API responsed successfully. | |
| if ( 200 == $http_code ) { | |
| $body = wp_remote_retrieve_body( $response ); | |
| $snapshot_data = json_decode( $body, true ); | |
| // Then check that we got valid JSON in the response. | |
| if ( $snapshot_data ) { | |
| // Check that there is a snapshot available. | |
| if ( count( $snapshot_data[ 'archived_snapshots' ] ) ) { | |
| // This check that the snapshot is available and had a successful http response code | |
| // is probably over the top but doing this just to be sure. | |
| if ( ( 200 == $snapshot_data[ 'archived_snapshots' ][ 'closest' ][ 'status' ] ) && | |
| ( true == $snapshot_data[ 'archived_snapshots' ][ 'closest' ][ 'available' ] ) ) { | |
| $date = DateTime::createFromFormat('Ymdhis', $snapshot_data[ 'archived_snapshots' ][ 'closest' ][ 'timestamp' ] ); | |
| $snapshot_url = $snapshot_data[ 'archived_snapshots' ][ 'closest' ][ 'url' ]; | |
| // Display the checked url, a link to the snapshot and the snapshot date. | |
| printf( '<tr><td>%s</td><td><a href="%s">%s</a></td><td>%s</td></tr>', | |
| $site_url, $snapshot_url, $snapshot_url, $date->format('Y-m-d H:i:s') ); | |
| } | |
| else { | |
| printf( '<tr><td>%s</td><td>Unknown issue with snapshot.</td><td></td></tr>', $site_url ); | |
| } | |
| } | |
| else { | |
| printf( '<tr><td>%s</td><td>No snapshot available</td><td></td></tr>', $site_url ); | |
| } | |
| } | |
| } | |
| else { | |
| // There was a problem contacting the Wayback Availability API. | |
| printf( '<tr><td>%s</td><td>Error - Response code: %s</td><td></td></tr>', $site_url, $http_code ); | |
| } | |
| } | |
| ?> | |
| </tbody> | |
| </table> | |
| </body> |
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