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PHP Quiz PHP CertificatePHP fseek() Function
Complete PHP Filesystem Reference
Definition and Usage
The fseek() function seeks in an open file.
This function moves the file pointer from its current position to a new position, forward or backward, specified by the number of bytes.
This function returns 0 on success, or -1 on failure. Seeking past EOF will not generate an error.
Syntax
fseek(file,offset,whence)
| Parameter | Description |
|---|---|
| file | Required. Specifies the open file to seek in |
| offset | Required. Specifies the new position (measured in bytes from the beginning of the file) |
| whence | Optional. (added in PHP 4). Possible values:
|
Tips and Notes
Tip: Find the current position by using ftell()!
Example
<?php
$file = fopen("test.txt","r");
// read first line
fgets($file);
// move back to beginning of file
fseek($file,0);
?>
$file = fopen("test.txt","r");
// read first line
fgets($file);
// move back to beginning of file
fseek($file,0);
?>
Complete PHP Filesystem Reference
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