ftell

Definition and usage

The current location of ftell() function in the open file.

This function returns the current location of the file pointer. If it fails, return false.

Example

 <?php
$file = fopen ( "test.txt" , "r" ) ;

// Output the current position
echo ftell ( $file ) ;

// Change the current position
fseek ( $file , "15" ) ;

//Open the current position again
echo ftell ( $file ) ;

fclose ( $file ) ;
?>

Output:

 0
15

grammar

 ftell ( file )

illustrate

The file pointer file must be valid and must point to a file that was successfully opened via fopen() or popen() .

In additional mode (adding parameter "a" to open the file) ftell() returns an undefined error.