note 87766 added to function.chmod

From the above comment --------- mmj048 at gmail dot com 04-Oct-2007 08:56 If you want to use a string for the second parameter, including user input, you MUST use octdec. http://www.php.net/octdec --------- I would like to tell you why octdec and some issues. It's only two fact here about do chmod dynamically/ passing the second parameter to it: 1. php variable internally conversion of integer number(OCT->DEC) and 2. chmod internally conversion of parameter which is not immediately/hardcoded OCTAL which always be converted by suppose any parameter there (both int, string) as Decimal (which should be convert by chmod before it will applied). The 1. is that if you do like this $mode = 0755; the leading zero tell php that the nuber here is Octal. but when it stored. It's just common decimal. (which can be some problem in this chmod thing) . I will skipped this for now. The 2. is that when chmod accepted the second parameter , like in the manual said "Note that mode is not automatically assumed to be an octal value, ..." which really occurred that : 2.1 In case of the immediately/hardcoded number leading with zero like 0755 . This no problem on it. 2.2 In any other case especially on using a variable there (even function which return value). The last value to be pass will be always recognized by chmod() as "DECIMAL" which chmod wil be ALWAYS internally DO CONVERSION on it. the conversion from dec to oct would be done. *Noted : Any last result will never be a nice octal for the chmod even though you do the decoct() to the parameter or any function you have . The chmod will ALWAYS convert that again cos it think of other leading zero hardcoded number as decimal: Trust me or check it yourself!!* 2.3 Any other character which can not be convert to integer should be not applied by chmod() and in the 2.2 that's WHY we will ALWAYS need to do octdec($mode_we_need_string); because we just pre-convert it to have chmod convert it back to the mode we really need, and of course octal internally of chmod itself!!. And back to the 1. if you accept the mode by Octal value. The stored value in the parameter/var,Remember it is converted to dec, like $mode_we_need = 0777; -> the stored is 511; and if you used this into the way of it is / it error again, So whenever we deal with Octal the best thing is 1. NOT TO USED OCTAL ON OPERATION, only display or accept and used it decimal is OK only, if you want to used it as it Octal as in chmod by this. It's very troublesome cos php seem not have some explicitly good handling on octal. In this chmod() case the solution about issue 1. are: 1.Accept the octal and convert it by decoct() onetime first. That change the value to resemble the value we need again then follow the solution 2.2. 2.Used string as input : may be the best solution : that is the octdec() kindly accepted string and also number. The string input can be leading with zero or not. Just a valid number in it which represent the mode you need. like "0755" or "777" because this will be converted somehow. I write this because I didn't get why mmj048 said octdec() and through all the test and confused until I get it. I realised it complicated or just tricky there, So I want to share here. *Noted again* Any conversion for the parameter to force the second parameter to be octal so that chmod will not convert it is useless! ---- Server IP: 69.147.83.197 Probable Submitter: 210.1.12.18 (proxied: 127.0.0.1) ---- Manual Page -- http://www.php.net/manual/en/function.chmod.php Edit -- https://master.php.net/note/edit/87766 Del: integrated -- https://master.php.net/note/delete/87766/integrated Del: useless -- https://master.php.net/note/delete/87766/useless Del: bad code -- https://master.php.net/note/delete/87766/bad+code Del: spam -- https://master.php.net/note/delete/87766/spam Del: non-english -- https://master.php.net/note/delete/87766/non-english Del: in docs -- https://master.php.net/note/delete/87766/in+docs Del: other reasons-- https://master.php.net/note/delete/87766 Reject -- https://master.php.net/note/reject/87766 Search -- https://master.php.net/manage/user-notes.php