wpsnoop Fatal error: Cannot redeclare _iscurlinstalled()

If you are dealing with a WordPress issue where a PHP Function _iscurlinstalled() was already declared it is most likely due to a plugin/theme conflict.

wpsnoop scanned and analyzed over 100,000 WordPress plugins and themes to find and locate potential conflicts including functions that share the same name.

This page has information on the 41 places where that function is declared and used in WordPress plugins and themes.

Note: Our database currently only taps into the free themes and plugins available in the publicly available WordPress plugins and themes, if your site uses paid plugins, themes or custom code there may be additional conflicts.


Our database has uncovered 41 different instances of potential conflicts where different plugins or themes share the function name.

Examples of this error include:

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-ads/jr-ads.php:41)

This file is part of the WordPress plugin JR Ads and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-alexa/jr-alexa.php:39)

This file is part of the WordPress plugin JR Alexa and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-analytics/jr-analytics.php:39)

This file is part of the WordPress plugin JR Analytics and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-chat/jr-chat.php:34)

This file is part of the WordPress plugin JR Chat and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-clock/jr-clock.php:39)

This file is part of the WordPress plugin JR Clock and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-compression/jr-compression.php:39)

This file is part of the WordPress plugin JR Compression and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-cursor/jr-cursor.php:39)

This file is part of the WordPress plugin JR Cursor and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-digg/jr-digg.php:39)

This file is part of the WordPress plugin JR Digg and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-effects/jr-effects.php:39)

This file is part of the WordPress plugin JR Effects and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-favicon/jr-favicon.php:39)

This file is part of the WordPress plugin JR Favicon and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-finance/jr-finance.php:39)

This file is part of the WordPress plugin JR Finance and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-googlebuzz/jr-googlebuzz.php:39)

This file is part of the WordPress plugin JR GoogleBuzz and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-grooveshark/jr-grooveshark.php:34)

This file is part of the WordPress plugin JR Grooveshark and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-lastfm/jr-lastfm.php:41)

This file is part of the WordPress plugin JR Last.FM and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-memberlist/jr-memberlist.php:39)

This file is part of the WordPress plugin JR Memberlist and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-news/jr_news.php:39)

This file is part of the WordPress plugin JR News and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-nofollow/jr_nofollow.php:54)

This file is part of the WordPress plugin JR NoFollow and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-online/jr-online.php:40)

This file is part of the WordPress plugin JR Online and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-pagerank/jr-pagerank.php:39)

This file is part of the WordPress plugin JR PageRank and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-poll/jr-poll.php:40)

This file is part of the WordPress plugin JR Poll and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-popularposts/jr-popularposts.php:40)

This file is part of the WordPress plugin JR PopularPosts and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-protection/jr-protection.php:39)

This file is part of the WordPress plugin JR Protection and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-quotes/jr_quotes.php:39)

This file is part of the WordPress plugin JR Quotes and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-ratings/jr-ratings.php:45)

This file is part of the WordPress plugin JR Ratings and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-referrer/jr-referrer.php:40)

This file is part of the WordPress plugin JR Referrer and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-relatedposts/jr-relatedposts.php:39)

This file is part of the WordPress plugin JR RelatedPosts and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-search/jr-search.php:75)

This file is part of the WordPress plugin JR Search and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-sitemap/jr-sitemap.php:37)

This file is part of the WordPress plugin JR Sitemap and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-sms/jr-sms.php:39)

This file is part of the WordPress plugin JR SMS and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-stats/jr-stats.php:39)

This file is part of the WordPress plugin JR Stats and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-tellyourfriends/jr-tellyourfriends.php:39)

This file is part of the WordPress plugin JR TellYourFriends and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-timezone/jr-timezone.php:39)

This file is part of the WordPress plugin JR Timezone and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-traffic/jr-traffic.php:39)

This file is part of the WordPress plugin JR Traffic and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-translate/jr-translate.php:39)

This file is part of the WordPress plugin JR Translate and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-twitter/jr-twitter.php:37)

This file is part of the WordPress plugin JR Twitter and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-ustream/jr-ustream.php:39)

This file is part of the WordPress plugin JR Ustream and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-vimeo/jr-vimeo.php:34)

This file is part of the WordPress plugin JR Vimeo and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-weather/jr-weather.php:39)

This file is part of the WordPress plugin JR Weather and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-wishlist/jr-wishlist.php:33)

This file is part of the WordPress plugin JR Wishlist and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/jr-youtube/jr-youtube.php:36)

This file is part of the WordPress plugin JR YouTube and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare _iscurlinstalled() (previously declared in wp-content/plugins/where-am-i/where-am-i.php:394)

This file is part of the WordPress plugin Where Am I and could be interacting with another theme or plugin and causing a fatal error.

The error occurs because two (or more) plugins that you are using are both trying to declare a function with the same name.