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<?php $src = ["apple", "cherry", "grape", "lemon", "orange", "strawberry"]; $dst = ["apple", "banana", "cherry", "orange", "pear"]; $src = array_combine($src, $src); $dst = array_combine($dst, $dst); $combined_items = $src + $dst; ksort($combined_items); $result = []; foreach ($combined_items as $item) { $result[] = [ $src[$item] ?? null, $dst[$item] ?? null ]; } echo "<table border=1> "; foreach ($result as $i => [$s, $d]) { printf( "<tr> <td>%d</td> <td>%s</td> <td>%s</td> </tr>\n", ++$i, $s, $d ); } echo "</table>";
Output for rfc.property-hooks, git.master_jit, git.master
<table border=1> <tr> <td>1</td> <td>apple</td> <td>apple</td> </tr> <tr> <td>2</td> <td></td> <td>banana</td> </tr> <tr> <td>3</td> <td>cherry</td> <td>cherry</td> </tr> <tr> <td>4</td> <td>grape</td> <td></td> </tr> <tr> <td>5</td> <td>lemon</td> <td></td> </tr> <tr> <td>6</td> <td>orange</td> <td>orange</td> </tr> <tr> <td>7</td> <td></td> <td>pear</td> </tr> <tr> <td>8</td> <td>strawberry</td> <td></td> </tr> </table>

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