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Efficient PHP Lookup for Large Word Lists

ellahayes

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Sep 22, 2026
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Hi everyone,

I’m working on a small PHP project that needs to check user-entered words against a fairly large dictionary. At first I considered loading the complete list into an array and using in_array(), but I’m wondering if there are more efficient approaches when the same data needs to be searched repeatedly.

I’m particularly interested in whether a sorted array with binary search, an associative array, or a database table with an indexed column would be the better option. The project is similar to a word puzzle such as Letter Boxed, where users can generate different word combinations and each candidate needs to be validated quickly.

For a PHP application, how would you normally structure this kind of lookup? Are there any approaches you would recommend for keeping memory usage reasonable while maintaining fast searches?
 

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