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<?php $message = 'What will happen to the #globe if there is more #sunlight more #moonlight but less overall #light. Ah! Funny little #joke. Goodbye fellas!!! #Morning Jokes #For No one.'; $GLOBALS['_loops'] = 0; function replace_hashes($match) { var_dump($match); return ++$GLOBALS['_loops'] <= 3 ? $match[0] : ' '; } echo "BEFORE : ", $message, "\n"; echo "AFTER : ", preg_replace_callback('~\h*#[a-z]+\h*~i', 'replace_hashes', $message), "\n"; echo "LOOPS : ", $GLOBALS['_loops'], "\n";
Output for git.master, git.master_jit, rfc.property-hooks
BEFORE : What will happen to the #globe if there is more #sunlight more #moonlight but less overall #light. Ah! Funny little #joke. Goodbye fellas!!! #Morning Jokes #For No one. AFTER : array(1) { [0]=> string(8) " #globe " } array(1) { [0]=> string(11) " #sunlight " } array(1) { [0]=> string(12) " #moonlight " } array(1) { [0]=> string(7) " #light" } array(1) { [0]=> string(6) " #joke" } array(1) { [0]=> string(10) " #Morning " } array(1) { [0]=> string(6) " #For " } What will happen to the #globe if there is more #sunlight more #moonlight but less overall . Ah! Funny little . Goodbye fellas!!! Jokes No one. LOOPS : 7

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