使用PHP搜索存储在文件中的大量单词列表的最快方法

Question

I have a text file that contains safe words. I want to be able to check user inputs which arrive as large strings (50-100 words) to make sure that they only contain safe words. I am wondering what is the right approach to do this in PHP.

The only approach I have in mind is looping through user's response word by word and compare against the list of safe words. This approach, unfortunately, leads to memory size issues!

The file that contains the safe words has well over 700K words.

Answer 1

you can try following code to convert file content in array. then you can use isset or in_array for further operations.

<?php    
$file = file_get_contents('test.txt');       
$arr=array_combine(explode(' ',$homepage));    
$final_arr=array_combine($arr,$arr);    
print_r($final_arr);    
?>    

hope this can help you.