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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 4.4.9, 5.2.4 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
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
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.8, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.3
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(6) "#globe" } array(1) { [0]=> string(9) "#sunlight" } array(1) { [0]=> string(10) "#moonlight" } array(1) { [0]=> string(6) "#light" } array(1) { [0]=> string(5) "#joke" } array(1) { [0]=> string(8) "#Morning" } array(1) { [0]=> string(4) "#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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