Extracts a substring from a string.
A string; the set of characters from string, beginning at start, of length count.
Mid(string, start, count)
| Parameter | Description |
|---|---|
|
string |
A string or a variable that contains one. Must be single-quotation mark or double-quotation mark delimited. |
|
start |
A positive integer or a variable that contains one. Position at which to start count. Positions start with 1, not 0. |
|
count |
A positive integer or a variable that contains one. Number of characters to return. (Zero is not valid, but it does not throw an error.) |
<h3>Mid Example</h3>
<cfif IsDefined("Form.myText")>
<!--- If len returns 0 (zero), then show error message. --->
<cfif Len(Form.myText)>
<cfif Len(Form.myText) LTE Form.RemoveChars>
<cfoutput><p style="color: red; font-weight: bold">Your string
#Form.myText# only has #Len(Form.myText)# characters. You cannot output
the #Form.removeChars# middle characters of this string because it is
not long enough.</p></cfoutput>
<cfelseif Form.startPos GTE Len(Form.myText)>
<cfoutput><p style="color: red; font-weight: bold">Your string
#Form.myText# only has #Len(Form.myText)# characters. You cannot start
at position #Form.startPos#.</p></cfoutput>
<cfelse>
<cfoutput><p>Your original string: <strong>#Form.myText#</strong></p>
<p>Your changed string, showing only the <strong>#Form.removeChars#
</strong> middle characters: <strong>#Mid(Form.myText,
Form.startPos, Form.removeChars)#</strong></p></cfoutput>
</cfif>
<cfelse>
<p style="color: red; font-weight: bold">Please enter a string of more
than 0 (zero) characters.</p>
</cfif>
</cfif>
<form action="<cfoutput>#CGI.ScriptName#</cfoutput>" method="POST">
<p>Type in some text<br />
<input type="Text" name="myText"></p>
<p>Enter a starting position (from the beginning of the entered text)<br />
<input name="startPos" type="text" size="1"></p>
<p>How many characters do you want to show?
<select name="RemoveChars">
<option value="1">1
<option value="3" selected>3
<option value="5">5
<option value="7">7
<option value="9">9</select>
<input type="Submit" name="Submit" value="Remove characters"></p>
</form>