[HideIf Comparison]Hide This HTML[/HideIf]
numero = 179hideif 'does the correct thing' when it hides its container: any contexts inside the [ hideif ] container (e.g. [append] or [replace] or [delete]) will NOT be executed if hideif evaluates to true.
Example (normally you would put the following text into a .dna file on your server and use a web browser to link to it):[hideif [username]=Grant][Authenticate User Grant][/hideif]Comparisons are always case-insensitive so "grant" equals "GRANT".
Comparison | Example | |
---|---|---|
equal | = | [hideif [username]=SAGEHEN]You're not Mr. Sagehen![/hideif] |
not equal | [hideif [random]!45]...[/hideif] | |
contains | ^ | [hideif [browsername]^Mozilla]...[/showif] |
begins with | ~ | [hideif [ipaddress]~245.078.013]...[/hideif]. Notice the IP address has been typed with 3 digits in each portion of the address. This is very important for making these comparison work as expected. |
less than | < | [hideif [random]<50]...[/hideif] |
greater than | > | [hideif [lastrandom]>25]...[/hideif] |
divisible by | \ | [hideif [index]\3]...[/hideif] |
if both sides of the equation are numbers, then the comparison for greater than, less than, and equals is performed numerically. If either side is not a number, then the comparison is performed alphabetically.
make sure neither side of the comparison equation contains any of the special comparison letters listed above. For example, [hideif I'm Friendly! Are you?=[question]] contains an exclamation point inside the sentence being compared, so WebDNA sees this as "I'm Friendly" is not equal to " Are you?=[question]", which is not what the author meant to compare.
The solution is to wrap each side of the comparison with [URL] contexts, like this:
[hideif [URL]I'm Friendly! Are you?[/URL]=[URL][question][/URL]]. This causes any embedded ! = > < symbols to be converted to their URL equivalents, which can then be compared correctly.
hideif 'does the correct thing' when it hides its container: any contexts inside the [ hideif ] container (e.g. [append] or [replace] or [delete]) will NOT be executed if hideif evaluates to true.
[hideif [username]=Grant][Authenticate User Grant][/hideif]
Comparison | Example | |
---|---|---|
equal | = | [hideif [username]=SAGEHEN]You're not Mr. Sagehen![/hideif] |
not equal | [hideif [random]!45]...[/hideif] | |
contains | ^ | [hideif [browsername]^Mozilla]...[/showif] |
begins with | ~ | [hideif [ipaddress]~245.078.013]...[/hideif]. Notice the IP address has been typed with 3 digits in each portion of the address. This is very important for making these comparison work as expected. |
less than | < | [hideif [random]<50]...[/hideif] |
greater than | > | [hideif [lastrandom]>25]...[/hideif] |
divisible by | \ | [hideif [index]\3]...[/hideif] |
if both sides of the equation are numbers, then the comparison for greater than, less than, and equals is performed numerically. If either side is not a number, then the comparison is performed alphabetically.
make sure neither side of the comparison equation contains any of the special comparison letters listed above. For example, [hideif I'm Friendly! Are you?=[question]] contains an exclamation point inside the sentence being compared, so WebDNA sees this as "I'm Friendly" is not equal to " Are you?=[question]", which is not what the author meant to compare.
The solution is to wrap each side of the comparison with [url] contexts, like this:
[hideif [url]I'm Friendly! Are you?[/URL]=[url][question][/URL]]. This causes any embedded ! = > < symbols to be converted to their URL equivalents, which can then be compared correctly.
DOWNLOAD WEBDNA NOW!
A list of user-submitted tips ...
WebDNA LibrariesA list of available libraries for WebDNA...
F.A.QA compilation of some user's questions...
Technical Change HistoryThis Technical Change History provides a reverse chronological list of WebDNA changes...
[biotype]BioType is a behavioral biometrics WebDNA function based on ADGS research and development (from version 8...
WebDNA ModulesA list of the currently available modules...
...
[authenticate]WebDNA provides a few options for password protecting your pages...
[sendmail]There is hardly a website that doesn't at some point need to send an email...
[switch]Executes the WebDNA inside the only [case] context which matches the given value...
[shell][shell] is a way to use the command line with your webserver...
[listfiles]When listing files...