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run code in 200+ php & hhvm versions
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<?php echo preg_replace("^Fig.+?From:\\s?", "", "Figure 1. Map of the Karamoja Region and Districts, Uganda.. From: Suspected Outbreak of Riboflavi"); ?>
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): No ending delimiter '^' found in /in/TnpNp on line 4
Output for 4.3.0 - 4.3.10
Warning: No ending delimiter '^' found in /in/TnpNp on line 4