fseek()¶
fseek() is a native PHP function that sets the file position indicator for a file pointer.
It moves the file pointer to a specified position, allowing random access to file content. This is useful for reading or writing specific parts of a file without processing the entire file.
<?php
$fp = fopen('/tmp/test.txt', 'r');
// Skip first 10 bytes
fseek($fp, 10);
// Move to end of file
fseek($fp, 0, SEEK_END);
// Move back 5 bytes from current position
fseek($fp, -5, SEEK_CUR);
?>
