$Web Num: Difference between revisions
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<span class="pageSubtitle"><section begin="desc" />Number of isindex and form fields<section end="desc" /></span> | <span class="pageSubtitle"><section begin="desc" />Number of isindex and form fields<section end="desc" /></span> | ||
<var>$Web_Num</var> retrieves the number of isindex and form fields in a URL. | |||
<var>$Web_Num</var> takes a single optional argument and returns a number. | |||
==Syntax== | ==Syntax== | ||
<p class="syntax"><section begin="syntax" /> % | <p class="syntax"><section begin="syntax" /> %count = $Web_Num( fieldname ) | ||
<section end="syntax" /></p> | <section end="syntax" /></p> | ||
===Syntax terms=== | |||
<table class="syntaxTable"> | <table class="syntaxTable"> | ||
<tr><th>fieldname</th> | <tr><th>fieldname</th> | ||
| Line 16: | Line 16: | ||
</td></tr></table> | </td></tr></table> | ||
==Usage notes== | |||
<ul> | |||
<li><var>$Web_Num</var> first counts isindex fields and then form fields. <var>$Web_Num</var> can be used instead of <var>[[$Web_IsIndex_Num]]</var> and <var>[[$Web_Form_Num]]</var> to make it easy to switch between using "method=GET" and "method=POST"<form> tags and simply to save typing. | |||
<li>For a discussion of isindex and form requests and data, see [[Janus Web Server application coding considerations#URL parameters or isindex data|"URL parameters or isindex data"]]. | |||
</ul> | |||
==Examples== | |||
An application written to handle isindex and form fields generically would need to determine the number of isindex and form fields in a URL before finding the names of the fields. | An application written to handle isindex and form fields generically would need to determine the number of isindex and form fields in a URL before finding the names of the fields. | ||
<p class="code"> %I_COUNT = $Web_Num | <p class="code">%I_COUNT = $Web_Num | ||
FOR %I FROM 1 TO %I_COUNT | |||
%RC = $SETG($Web_Name(%I), $Web_Parm(,%I)) | |||
END FOR | |||
</p> | </p> | ||
In this example, a global variable is set to contain the values of all isindex and form fields set by the browser. The name of the global is the name of the form or isindex field and its value is, of course, the form or isindex field value. This example will not work correctly if there are two or more isindex and/or form fields that share the same name. Multiple fields with the same name are common occurrences in HTML forms, especially in <select> lists that generate a fieldname/value pair for each item selected from the list. | In this example, a global variable is set to contain the values of all isindex and form fields set by the browser. The name of the global is the name of the form or isindex field and its value is, of course, the form or isindex field value. This example will not work correctly if there are two or more isindex and/or form fields that share the same name. Multiple fields with the same name are common occurrences in HTML forms, especially in <select> lists that generate a fieldname/value pair for each item selected from the list. | ||
==See also== | ==See also== | ||
<ul> | <ul> | ||
<li><var>[[$Web_Parm_Len]]</var> | <li><var>[[$Web_Parm_Len]]</var> | ||
<li><var>[[$Web_Name]]</var> | <li><var>[[$Web_Name]]</var> | ||
| Line 38: | Line 40: | ||
<li><var>[[$Web_Num_IsIndex]]</var> | <li><var>[[$Web_Num_IsIndex]]</var> | ||
</ul> | </ul> | ||
[[Category:Janus Web Server $functions|$Web_Num]] | [[Category:Janus Web Server $functions|$Web_Num]] | ||
Revision as of 14:23, 13 June 2012
<section begin="desc" />Number of isindex and form fields<section end="desc" />
$Web_Num retrieves the number of isindex and form fields in a URL.
$Web_Num takes a single optional argument and returns a number.
Syntax
<section begin="syntax" /> %count = $Web_Num( fieldname ) <section end="syntax" />
Syntax terms
| fieldname | Specifies to count only the isindex and form fields that match fieldname. If omitted, returns the count of all isindex and form fields. |
|---|
Usage notes
- $Web_Num first counts isindex fields and then form fields. $Web_Num can be used instead of $Web_IsIndex_Num and $Web_Form_Num to make it easy to switch between using "method=GET" and "method=POST"<form> tags and simply to save typing.
- For a discussion of isindex and form requests and data, see "URL parameters or isindex data".
Examples
An application written to handle isindex and form fields generically would need to determine the number of isindex and form fields in a URL before finding the names of the fields.
%I_COUNT = $Web_Num FOR %I FROM 1 TO %I_COUNT %RC = $SETG($Web_Name(%I), $Web_Parm(,%I)) END FOR
In this example, a global variable is set to contain the values of all isindex and form fields set by the browser. The name of the global is the name of the form or isindex field and its value is, of course, the form or isindex field value. This example will not work correctly if there are two or more isindex and/or form fields that share the same name. Multiple fields with the same name are common occurrences in HTML forms, especially in <select> lists that generate a fieldname/value pair for each item selected from the list.