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<?php // user input of years $ar = [1944, 1674, 3021]; // find max year $maxCentury = max(...$ar); // get max century $roundedCentury = round($maxCentury, -3); foreach($ar as $year) { foreach(range(0, $roundedCentury, 1000) as $century) { if($century <= $year) { echo "<li> $century <ul>" . $year . "</ul> </li>"; } } }
Output for 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.4, 8.3.6
<li> 0 <ul>1944</ul> </li><li> 1000 <ul>1944</ul> </li><li> 0 <ul>1674</ul> </li><li> 1000 <ul>1674</ul> </li><li> 0 <ul>3021</ul> </li><li> 1000 <ul>3021</ul> </li><li> 2000 <ul>3021</ul> </li><li> 3000 <ul>3021</ul> </li>
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 <li> 0 <ul>1944</ul> </li><li> 1000 <ul>1944</ul> </li><li> 0 <ul>1674</ul> </li><li> 1000 <ul>1674</ul> </li><li> 0 <ul>3021</ul> </li><li> 1000 <ul>3021</ul> </li><li> 2000 <ul>3021</ul> </li><li> 3000 <ul>3021</ul> </li>
preferences:
181.5 ms | 402 KiB | 191 Q