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<?php function preg_quote_replacement($str) { return addcslashes($str, '\\$'); } $text = 'Invoice: You owe me *#5* !'; $user_search = "*#5*"; $user_replace = "*$5*"; $search = preg_quote($user_search, "/"); $replace_bad1 = $user_replace; $replace_bad2 = preg_quote($user_replace); $replace_good = preg_quote_replacement($user_replace); $new_text1 = preg_replace("/$search/", $replace_bad1, $text); $new_text2 = preg_replace("/$search/", $replace_bad2, $text); $new_text3 = preg_replace("/$search/", $replace_good, $text); echo "Input: $text\nNew1: $new_text1\nNew2: $new_text2\nNew3: $new_text3\n";
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.26, 8.0.0 - 8.0.13, 8.1rc1 - rc3
Input: Invoice: You owe me *#5* ! New1: Invoice: You owe me ** ! New2: Invoice: You owe me \*$5\* ! New3: Invoice: You owe me *$5* !

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