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<?php $address = "#&#&#&"; $delimiter = '#&'; if (preg_match('~^(?:' . preg_quote($delimiter) . ')+$~', $address)) { echo 'Text comprised solely of one or more delimiting substrings'; }
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Text comprised solely of one or more delimiting substrings

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