<?php $filePath = 'path/to/uploaded_file.csv';
The most common way to detect encoding is using the extension ( mbstring ). This is a standard PHP extension.
Here is a robust, native helper function you can drop into your project: detect encoding php
A common scenario is that a string is already UTF-8, but it was inserted into a database column configured as Latin-1, resulting in "garbage" characters (e.g., é instead of é ).
Starting with , the detection logic was overhauled. Previously, the function returned the first encoding in the candidate list that matched the bytes. Now, it uses heuristics to determine the most likely encoding across the entire list, regardless of the order you provide. Best Practices for Accuracy Starting with , the detection logic was overhauled
echo $encoding; // Outputs: utf-8, iso-8859-1, binary, etc. ?>
Don't confuse (how bytes are structured) with MIME content type . Best Practices for Accuracy echo $encoding; // Outputs:
The root cause?
We’ve all been there. You import a CSV from a client, scrape a legacy website, or process an old text file, and suddenly your output looks like é instead of é . Garbage characters. Mojibake.
Files in formats like or UTF-32 often start with a Byte Order Mark (BOM) . You can detect these by checking the first few bytes of a file: UTF-8: EF BB BF UTF-16 (Big Endian): FE FF UTF-16 (Little Endian): FF FE 4. Why Detection Should Be Your Last Resort