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Commonly used array functions in php (4) (whether there is a certain key name or index in the array)

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Release： 2016-10-28 15:03:32
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/***********array_key_exists(检查键名或索引是否在数组中)*****************/ $arr1 = array('name' => 'Sheldon', 'age' => 30, 'address' => 'Carlifornia'); if (array_key_exists('name', $arr1)) { echo 'the name element is in the array.'; } else { echo 'name elment not exist.'; }
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Check if there is a key named 'name' in $arr1.

Also check the numerical index.

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php中的常用数组函数（四）（数组中是否有某个键名或索引）
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