PHP技术问题：跳过Babylon格式文件开头特定的20行（含###/;行）

It looks like your code is missing checks for lines starting with ;—that's why those two lines aren't being skipped! Your current logic only handles lines starting with #, so the ;-prefixed lines slip through without triggering the continue statement.

Here are two approaches to fix this, depending on your exact needs:

Option 1: Skip Exactly the First 20 Lines #

If you know you always need to skip the first 20 lines (regardless of their content), this is the most straightforward solution:

elseif($sourceformat == "Babylon") {
    // Skip the first 20 lines explicitly
    for ($skipCount = 0; $skipCount < 20; $skipCount++) {
        fgets($source_file);
    }
    
    // Now process the rest of the file
    while (($line = fgets($source_file)) !== false) {
        $source = trim($line);
        // ... your existing processing logic here
    }
}

Option 2: Skip All Leading Comment Lines (### or ;) #

If the number of leading comment lines might vary, but you want to skip any line that starts with ### or ; at the top of the file, use this approach:

elseif($sourceformat == "Babylon") {
    while (($line = fgets($source_file)) !== false) {
        $trimmedLine = trim($line);
        
        // Skip lines that start with ### or ;
        if (strpos($trimmedLine, '###') === 0 || strpos($trimmedLine, ';') === 0) {
            continue;
        }
        
        // Found the first non-comment line—process it and continue
        $source = trim($line);
        // ... your existing processing logic here
        
        // If you need to keep processing subsequent lines, remove this break
        break;
    }
}

Why Your Original Code Failed #

Your original checks only looked for lines starting with #, but the two problematic lines start with ;—those weren't covered by any of your conditions. The adjusted code adds the missing check for ; and trims the line first to handle any accidental leading whitespace that might throw off the start-of-line check.

内容的提问来源于stack exchange，提问作者cheeseus