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<html> <head> <title>array_key_exist</title> </head> <body> <?php $state["Delaware"] = "December 7, 1787"; $state["Pennsylvania"] = "December 12, 1787"; $state["Ohio"] = "March 1, 1803"; if (array_key_exists("Ohio", $state)) echo "Ohio joined the Union on $state[Ohio]"; ?> </body> </html>
Output:
![](image/6.gif)
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