3v4l.org

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<?php $input = '1d 0h 16m 2s'; sscanf($input, '%dd %dh %dm %ds', $d, $h, $m, $s); echo "$input = " . $d * 86400 + $h * 3600 + $m * 60 + $s . " seconds\n";
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.7
1d 0h 16m 2s = 87362 seconds

preferences:
84.58 ms | 1117 KiB | 4 Q