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                # PHP similar_text() 函數 ## 定義和用法 similar_text() 函數計算兩個字符串的匹配字符的數目。 該函數也可以計算兩個字符串的相似度(以百分比計)。 ### 語法 ``` similar_text(string1,string2,percent) ``` | 參數 | 描述 | | --- | --- | | string1 | 必需。規定要比較的第一個字符串。 | | string2 | 必需。規定要比較的第二個字符串。 | | percent | 可選。規定供存儲百分比相似度的變量名。 | ## 提示和注釋 注釋:[levenshtein()](/php/func_string_levenshtein.asp "PHP levenshtein() 函數") 函數比 similar_text() 函數更快。不過,similar_text() 函數通過更少的必需修改次數提供更精確的結果。 ## 例子 ### 例子 1 ``` <?php echo similar_text("Hello World","Hello Peter"); ?> ``` 輸出: ``` 7 ``` ### 例子 2 ``` <?php similar_text("Hello World","Hello Peter",$percent); echo $percent; ?> ``` 輸出: ``` 63.6363636364 ```
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