Why Does My PHP `while (!feof())` Loop Produce Incomplete Output?

PHP Loop: Resolving Incomplete Output with while (!feof())

In PHP, you can encounter situations where a loop using while (!feof()) doesn't output all the expected content. This issue can arise due to an incorrect placement of the EOF check within the loop, as demonstrated by a user trying to read and echo an entire .txt file.

The original code:

$handle = fopen("item_sets.txt", "r");

while (!feof($handle)) {
    $buffer = fgets($handle, 4096);
    $trimmed = trim($buffer);
    echo $trimmed;
}

In this code, the check for EOF is placed before outputting the read content. As a result, the loop exits and stops reading the file before the last line is completely printed.

The solution involves incorporating the EOF check within the reading process:

$handle = fopen("item_sets.txt", "r");

while (($buffer = fgets($handle, 4096)) !== false) {
    $trimmed = trim($buffer);
    echo $trimmed;
}

By moving the EOF check to the condition of the while loop, the code ensures that the loop continues reading and printing lines until the end of the file is reached.

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