Re: [PHP] Variables and Strings
On Thu, December 29, 2005 3:31 pm, PHP Superman wrote: > Thanks for the responses guys, but what i'm saying is i would like to > return > all the variable names i have in a string, > $String="Blah Blah Blah $VarName Blah Blah Blah"; $VarName = 'xyz'; $String now has "Blah Blah Blah xyz Blah Blah Blah" in it. There is *NOTHING* left to indicate that xyz came from a variable. You simply do not have the context available to do what you want. Now, you *COULD* do like this: $VarName = 'xyz'; $Template = 'Blah Blah Blah $VarName Blah Blah Blah'; Note the use of single quotes that does NOT interpret variables. You now have a $Template from which, with luck, you could: A) compose $String using: eval('$String = "$Template";'); B) use something not unlike this: preg_match_all('/\\$([a-z0-9_]+/sU', $Template, $variables); foreach($variables[1] as $varname){ echo "$varname = ", $$varname; } I'll warn you right now that whatever it is you are doing, there is PROBABLY a better easier way to do it, but you've put on blinders to other solutions and only asked us how to do what you think you want to do, which is probably not what you really want to do... -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Variables and Strings
[snip] > They are all variants of that. All nifty little tools. We should gather > those up someplace...shouldn't we? > Well, I just purchased some domains for that. Who wants to develop it? ;) phpdepository.com phpdepository.org phpdepository.net [/snip] I'll contribute... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Variables and Strings
Jay Blanchard wrote: [snip] ah heck is that the same code that _we_ (Jay and me, etc) played with to find SQL queries? or something that was based on it? I remember Robin Vickery coming up with a token based variant which was rather nifty - must look into that agian sometime! [/snip] They are all variants of that. All nifty little tools. We should gather those up someplace...shouldn't we? Well, I just purchased some domains for that. Who wants to develop it? ;) phpdepository.com phpdepository.org phpdepository.net -- John C. Nichel IV Programmer/System Admin (ÜberGeek) Dot Com Holdings of Buffalo 716.856.9675 [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Variables and Strings
[snip] I wrote a doohickey once which searched for all variable searching doohickies. [/snip] I cannot tell you how happy I am to see you use the past perfect tense correctly there. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Variables and Strings
Jay Blanchard wrote: [snip] yeah 'Superman' explain what it is you want to do AND why - then maybe we can give you some help - what you are currently asking is impossible (well actually Jay Blanchard hinted at a way to do it but I firmly believe that its conceptually over your head atm and very probably not a good solution to what you want to acheive - which is not to say that Jays hint was crap or wrong; more like the problem you posed originally is moot.) [/snip] We actually wrote a little code doohickey called Variable Hunter in which the doohickey could be run within a project folder and locate all of the variables with their respective name spaces and lines numbers. Nifty little tool. I wrote a doohickey once which searched for all variable searching doohickies. -- John C. Nichel IV Programmer/System Admin (ÜberGeek) Dot Com Holdings of Buffalo 716.856.9675 [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Variables and Strings
[snip] ah heck is that the same code that _we_ (Jay and me, etc) played with to find SQL queries? or something that was based on it? I remember Robin Vickery coming up with a token based variant which was rather nifty - must look into that agian sometime! [/snip] They are all variants of that. All nifty little tools. We should gather those up someplace...shouldn't we? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Variables and Strings
Jay Blanchard wrote: [snip] yeah 'Superman' explain what it is you want to do AND why - then maybe we can give you some help - what you are currently asking is impossible (well actually Jay Blanchard hinted at a way to do it but I firmly believe that its conceptually over your head atm and very probably not a good solution to what you want to acheive - which is not to say that Jays hint was crap or wrong; more like the problem you posed originally is moot.) [/snip] We actually wrote a little code doohickey called Variable Hunter in which the doohickey could be run within a project folder and locate all of the variables with their respective name spaces and lines numbers. Nifty little tool. ah heck is that the same code that _we_ (Jay and me, etc) played with to find SQL queries? or something that was based on it? I remember Robin Vickery coming up with a token based variant which was rather nifty - must look into that agian sometime! rgds, JOchem -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Variables and Strings
[snip] yeah 'Superman' explain what it is you want to do AND why - then maybe we can give you some help - what you are currently asking is impossible (well actually Jay Blanchard hinted at a way to do it but I firmly believe that its conceptually over your head atm and very probably not a good solution to what you want to acheive - which is not to say that Jays hint was crap or wrong; more like the problem you posed originally is moot.) [/snip] We actually wrote a little code doohickey called Variable Hunter in which the doohickey could be run within a project folder and locate all of the variables with their respective name spaces and lines numbers. Nifty little tool. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Variables and Strings
Jim Moseby wrote: Thanks for the responses guys, but what i'm saying is i would ... I believe what Jochem is trying to tell you is that when you assign the string variable, the variable names are expanded to their values, so the names are no longer available. exactly - nicely put Jim. Consider this: $partname='widget'; $amount=100; $string="This $partname costs $amount dollars"; /* $string now equals "This widget costs 100 dollars", so when you pass it to your function, it has no way to know for sure what the variables were, or that there even were ANY variables involved in the generation of the string. The variable NAMES are not passed because PHP expands them to their values and sets $string accordingly. */ $string='This $partname costs $amount dollars'; $string now equals "This $partname costs $amount dollars". In this case, I used single quotes. The values are not expanded and the variable NAMES are passed. The VALUE of the variables are not. So you could then have a function look for any word that starts with a $ and return an array of names. hopefully thats clear to the OP now - and he can [re]state his goal in order that we might point him into a more fruitful direction! That all being said, what in the world are you trying to do with this? I bet you $1.78 (the change in my desk drawer) there is a much better way to solve whatever problem it is than the way you are trying here. yeah 'Superman' explain what it is you want to do AND why - then maybe we can give you some help - what you are currently asking is impossible (well actually Jay Blanchard hinted at a way to do it but I firmly believe that its conceptually over your head atm and very probably not a good solution to what you want to acheive - which is not to say that Jays hint was crap or wrong; more like the problem you posed originally is moot.) JM Because it ruins the flow of the conversation. evil genius ;-) Why is top posting a bad thing? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Variables and Strings
> > Thanks for the responses guys, but what i'm saying is i would > like to return > all the variable names i have in a string, > $String="Blah Blah Blah $VarName Blah Blah Blah"; > $Vars=myspecialfunction($Varname); > echo ($Vars); > > that code would produce $Varname, if there were more > variables it would also > return the Variable Names in an array I believe what Jochem is trying to tell you is that when you assign the string variable, the variable names are expanded to their values, so the names are no longer available. Consider this: $partname='widget'; $amount=100; $string="This $partname costs $amount dollars"; /* $string now equals "This widget costs 100 dollars", so when you pass it to your function, it has no way to know for sure what the variables were, or that there even were ANY variables involved in the generation of the string. The variable NAMES are not passed because PHP expands them to their values and sets $string accordingly. */ $string='This $partname costs $amount dollars'; $string now equals "This $partname costs $amount dollars". In this case, I used single quotes. The values are not expanded and the variable NAMES are passed. The VALUE of the variables are not. So you could then have a function look for any word that starts with a $ and return an array of names. That all being said, what in the world are you trying to do with this? I bet you $1.78 (the change in my desk drawer) there is a much better way to solve whatever problem it is than the way you are trying here. JM Because it ruins the flow of the conversation. >Why is top posting a bad thing? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Variables and Strings
[snip] Thanks for the responses guys, but what i'm saying is i would like to return all the variable names i have in a string, $String="Blah Blah Blah $VarName Blah Blah Blah"; $Vars=myspecialfunction($Varname); echo ($Vars); that code would produce $Varname, if there were more variables it would also return the Variable Names in an array [/snip] And you call yourself Superman?!? Keep in mind that the variable name in a double quoted string is interpreted, you would have to use an outside process to read each line of the file, locate the lines where the variables are, and then process to your liking. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Variables and Strings
Thanks for the responses guys, but what i'm saying is i would like to return all the variable names i have in a string, $String="Blah Blah Blah $VarName Blah Blah Blah"; $Vars=myspecialfunction($Varname); echo ($Vars); that code would produce $Varname, if there were more variables it would also return the Variable Names in an array On 12/29/05, Jochem Maas <[EMAIL PROTECTED]> wrote: > > PHP Superman wrote: > > Hey everyone, is there a way to return all the variables from a string > into > > an array, for example > > $Var1="Yo"; > > $Var2="Man"; > > $SQL="SELECT * FROM tblname WHERE 4=$Var1 AND WHERE 3=$Var2"; > > $AllVars=MySpecialFunction($SQL); > > your function MySpecialFunction() will recieve the following string: > > "SELECT * FROM tblname WHERE 4=Yo AND WHERE 3=Man" > > which apart from being (probably) incorrect SQL, is just a string - > how is your special function supposed to tell which chars are part of > the previously injected variables' values - and even more impossible: > how would the function find out what those variables we're called to > begin with (it can't). > > what is it you would like to achieve? > > rgds, > jochem > > PS - learn to walk before you fly ;-) > > > print_r($AllVars); > > > > would ideally print an array like: > > { > > array > > $Var1="Yo" > > $Var2="Man" > > > > } > > i think i should use an ereg or preg replace but I don't know much about > > them or how to use them, thanks in advance > > > > -- Hi Everyone, I am running PHP 5 on Windosws XP SP2 with MySQL5, Bye Now!
Re: [PHP] Variables and Strings
PHP Superman wrote: Hey everyone, is there a way to return all the variables from a string into an array, for example $Var1="Yo"; $Var2="Man"; $SQL="SELECT * FROM tblname WHERE 4=$Var1 AND WHERE 3=$Var2"; $AllVars=MySpecialFunction($SQL); your function MySpecialFunction() will recieve the following string: "SELECT * FROM tblname WHERE 4=Yo AND WHERE 3=Man" which apart from being (probably) incorrect SQL, is just a string - how is your special function supposed to tell which chars are part of the previously injected variables' values - and even more impossible: how would the function find out what those variables we're called to begin with (it can't). what is it you would like to achieve? rgds, jochem PS - learn to walk before you fly ;-) print_r($AllVars); would ideally print an array like: { array $Var1="Yo" $Var2="Man" } i think i should use an ereg or preg replace but I don't know much about them or how to use them, thanks in advance -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Variables and Strings
On Wed, Dec 28, 2005 at 10:30:04PM -0500, PHP Superman wrote: > Hey everyone, is there a way to return all the variables from a string into > an array, for example > $Var1="Yo"; > $Var2="Man"; > $SQL="SELECT * FROM tblname WHERE 4=$Var1 AND WHERE 3=$Var2"; > $AllVars=MySpecialFunction($SQL); > print_r($AllVars); I'm not sure what your trying to do but well, var_dump($Var1, $Var2, $AllVars); Curt. -- cat .signature: No such file or directory -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Variables and Strings
Hey everyone, is there a way to return all the variables from a string into an array, for example $Var1="Yo"; $Var2="Man"; $SQL="SELECT * FROM tblname WHERE 4=$Var1 AND WHERE 3=$Var2"; $AllVars=MySpecialFunction($SQL); print_r($AllVars); would ideally print an array like: { array $Var1="Yo" $Var2="Man" } i think i should use an ereg or preg replace but I don't know much about them or how to use them, thanks in advance