Parameter
Last updated on
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Also applies to ColdFusion
Description
Replaces occurrences of substring1 in a string with an object in a specified scope. The search is case sensitive.
This function can take either string or callback function as an argument instead of the argument to replace the string.
Returns
The string, after making replacements.
Category
Function syntax
Replace(string, substring, obj [, scope ],start)
History
ColdFusion (2021 release):
- Added the parameter start.
- Also, callback support is added.
See also
Parameters
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Description |
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string |
A string or a variable that contains one. String in which to search. |
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substring1 |
A string or a variable that contains one. String for which to search |
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obj |
String that replaces substring1 or callback function. You can also pass a callback function in this argument. function(transform,position,original) {...} |
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scope |
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start |
Position to start searching in the string (starts at 1). |
Usage
To remove a string, specify the empty string ("") as substring2. You do not need to escape comma characters in strings. For example, the following code deletes the commas from the sentence:
replace("The quick brown fox jumped over the lazy cow, dog, and cat.",",","","All") |
Example
<cfoutput>#replace("The quick brown fox","o","cf","all")#</cfoutput>
The code produces the following output:
The quick brcfwn fcfx
Example with callback function
<cfscript>
myStr="happy app application apply appreciate appreciation Apprentice";
outStr = replace( myStr, "app", function (transform, position, original){
return UCase(transform);
}, "all");
writeoutput(outStr);
</cfscript>
The code produces the following output:
hAPPy APP APPlication APPly APPreciate APPreciation APPrentice
Example 2
<cfscript>
mystring="The quick brown fox jumped over the lazy cow."
substring="ow"
replacement="aze"
scope="ALL"
start=len("The quick brown")
writeOutput(replace(mystring,substring,replacement,scope,start))
writeOutput("<br/>")
// Scope="ONE"
writeOutput(replace(mystring,substring,replacement,"ONE",start))
</cfscript>
Output
The quick brown fox jumped over the lazy caze.
The quick brown fox jumped over the lazy caze.
Example 3
<cfscript>
// Define the callback function
callback=(regexp,position,original)=>{
retString = regExp.reverse()&"aze"
return retString
}
baseStr="The quick brown fox jumped over the lazy cow."
writeOutput(replace(baseStr, "ow", callback, "all", len("The quick bro")) & "<br>")
writeOutput(replace(baseStr, "ow", callback, "all", len("The quick brown")) & "<br>")
</cfscript>
Output
The quick brwoazen fox jumped over the lazy cwoaze.
The quick brown fox jumped over the lazy cwoaze.