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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # PHP in_array() 函數 ## 定義和用法 in_array() 函數在數組中搜索給定的值。 ### 語法 ``` in_array(value,array,type) ``` | 參數 | 描述 | | --- | --- | | value | 必需。規定要在數組搜索的值。 | | array | 必需。規定要搜索的數組。 | | type | 可選。如果設置該參數為 true,則檢查搜索的數據與數組的值的類型是否相同。 | ### 說明 如果給定的值 _value_ 存在于數組 _array_ 中則返回 true。如果第三個參數設置為 true,函數只有在元素存在于數組中且數據類型與給定值相同時才返回 true。 如果沒有在數組中找到參數,函數返回 false。 注釋:如果 _value_ 參數是字符串,且 _type_ 參數設置為 true,則搜索區分大小寫。 ## 例子 1 ``` <?php $people = array("Peter", "Joe", "Glenn", "Cleveland"); if (in_array("Glenn",$people)) { echo "Match found"; } else { echo "Match not found"; } ?> ``` 輸出: ``` Match found ``` ## 例子 2 ``` <?php $people = array("Peter", "Joe", "Glenn", "Cleveland", 23); if (in_array("23",$people, TRUE)) { echo "Match found<br />"; } else { echo "Match not found<br />"; }if (in_array("Glenn",$people, TRUE)) { echo "Match found<br />"; } else { echo "Match not found<br />"; }if (in_array(23,$people, TRUE)) { echo "Match found<br />"; } else { echo "Match not found<br />"; } ?> ``` 輸出: ``` Match not found Match found Match found ```
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