see below... "Jochem Maas" <jochem@xxxxxxxxxxxxx> wrote in message news:4339BDD6.8070301@xxxxxxxxxxxxxxxx > see below.. > > Scott Fletcher wrote: > > "Jochem Maas" <jochem@xxxxxxxxxxxxx> wrote in message > > news:43399EFC.4030109@xxxxxxxxxxxxxxxx > > > >>Mike Dunlop wrote: > >> > >>>On Sep 27, 2005, at 10:22 AM, Scott Fletcher wrote: > >>> > >>> > >>>>[code] > >>>> $array = array(); > >>>> > >>>> $array['col1']['col2'] = "Test #1"; > >>>> $array['col3']['col2'] = "Test #2"; > >>>> > >>>> $prefix = "['col3']['col2']"; > >>>> > >>>> echo $array.$prefix; //Spitted out result as "Test #2"... > >>>>[/code] > >>>> > > > ... > > > >>----------------------------- > >>try something like this instead?: > >>(code has been tested) > >> > >>function getVal($arr, $path) > >>{ > >> $retval = null; > >> > >> if (!is_array($arr) || empty($arr) || > >> !is_array($path) || empty($path)) { > >> return null; > >> } > >> > >> while (count($path)) { > >> $key = array_shift($path); > >> if (!isset($arr[ $key ])) { > >> return null; > >> } > >> $retval = $arr[ $key ]; > >> $arr =& $arr[ $key ]; > >> } > >> > >> return $retval; > >>} > >>$ra = array(); > >>$ra["col3"]["col2"] = "Test #2"; > >>$path = array("col3","col2"); > >>echo getVal($ra, $path); > > > > > > > >>- but doesn't answer the OPs question actually imho the > > > > What does the "OP" stand for? > > ok so your new here :-) OP = Original Poster. aka the guy that > asked the question, you in this case :-) Heh heh, nice try... I'm not that new here. I have been using this for 5 years now. Just that I don't use it often unless I have a breakdown. ;-) > > > > > Wow, that is really nice. I was hoping the $path would be a string instead > > of an array but I'll live. It should work with random changes to the $path > > its easy to change to a string, here's a new and improved version: > > function getVal($arr, $path) > { > $retval = null; > > if (is_string($path)) $path = explode(",", $path); > > if (!is_array($arr) || empty($arr) || > !is_array($path) || empty($path)) return null; > > // uncomment to trim the values that act as keys > //$path = array_map("trim", $path); > > while ($c = count($path)) { > $key = array_shift($path); > > // check the key is ok, exists and that we have an array to > // move onto if this is not the last 'step' in the 'path' > if ((!is_string($key) && !is_numeric($key)) || > !isset($arr[ $key ]) || > ($c > 1 && !is_array($arr[ $key ]))) { return null; } > > $arr = $arr[ $key ]; > } > > return $arr; > } > > $arra = array("col3" => array("col2" => "Test #2", "junk" => array("boat" => "yeah!"))); > $path = array("col3","col2"); > $htap = "col3,col2"; > $junk = "col3,junk"; > $knuj = "junk,col3"; > $boat = "col3,junk,boat"; > > echo "\n1:", getVal($arra, $path), > "\n\n2:", getVal($arra, $htap), > "\n\n3:", getVal($arra, $arra), > "\n\n4:", getVal($arra, $junk), > "\n\n5:", getVal($arra, $knuj), > "\n\n6:", getVal($arra, $boat); > > > but I think an array would be easier to manipulate as a 'path'. > > > array (shorter or longer arrays, more keys or less keys, etc). I hope. :-) > > please stop hoping - try it out instead. > and try to work out what the code does exactlythere are > questions as to what happens when a given 'path' > in an array cannot be found, it may not do what you want > then in which _you_ will have to change it. > > have fun. :-) > > oh and try to google some material about why eval() > is something to be avoided unless its completely impractical, > the oneliner is not always a big gain over a 10 line function. > > take this string: > > '$s = $arr["a"]["b"]["c"]["d"]["e"]["f"]["g"]["h"];' > > if you were to eval that how much control would you > have when you starting getting errors within that line of > code that's run 'inside' eval? (the code actually runs inline of > the current scope if that means anything (to you)). > > and what if all the array keys are dynamic coming from a > webpage and liable to contain snippets of php code? ... > > exec('rm -rf *'); > > I believe eval() comes with its own unofficial tagline: > 'if your using eval() your _probably_ doing it wrong.' > > strange the beliefs people have. > > > > > Thanks... > > Yea, strange the beliefs people have here. :-) Will try to play around with the coding... I'm going to have a heck of a headache for a while. ;-) Thanks.. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
