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<?php $event = ['items' => ['5' => '6', 'coucou' => '6']]; foreach (['5' => '6'] as $key => $value) { var_dump($key); }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(5)

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174.54 ms | 403 KiB | 213 Q