Errore strano

[Rossella_75]

ciao a tutti,

qualcuno mi sa dire che errore è??

Warning: Cannot send session cache limiter - headers already sent (output started at c:\programmi\apache group\apache\htdocs\incisoria\admin\index.php:1) in c:\programmi\apache group\apache\htdocs\incisoria\admin\index.php on line 51

Warning: open(/tmp\sess_8a699a6a2029390ee05fbb6b080d200f, O_RDWR) failed: No such file or directory (2) in c:\programmi\apache group\apache\htdocs\incisoria\admin\index.php on line 51

Warning: Cannot add header information - headers already sent by (output started at c:\programmi\apache group\apache\htdocs\incisoria\admin\index.php:1) in c:\programmi\apache group\apache\htdocs\incisoria\admin\index.php on line 87

Warning: open(/tmp\sess_8a699a6a2029390ee05fbb6b080d200f, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

:master:

[}gu|do[z]{®©]

headers already sent (output started at c:\programmi\apache group\apache\htdocs\incisoria\admin\inde
x.php:1)

è chiaro..

hai dell'output prima degli header [le sesisoni usano headers HTTP]

output:
1) spazio testo o html prima della sezione php
2) risultato di echo, print e simili