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Editorial Team
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Asked: 2026-06-08T22:29:18+00:00

I have a problem, I need to edit an xml file using php, based

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I have a problem, I need to edit an xml file using php, based on a string variable it has been passed.

i.e., my php has a string variable which takes the value of either “true” or “false” and I need to alter the following xml file code:

<Parameter>             
     <ParameterName>Method1</ParameterName>                  
     <ParameterDescription>description</ParameterDescription>
     <ParameterValue type="bool">false</ParameterValue>
</Parameter>

<Parameter> 
     <ParameterName>Method2</ParameterName>       
     <ParameterDescription>description</ParameterDescription> 
     <ParameterValue type="bool">true</ParameterValue>
</Parameter> 

<Parameter>
     <ParameterName>Method3</ParameterName>
     <ParameterDescription>description</ParameterDescription>
     <ParameterValue type="float">0.025</ParameterValue> 
</Parameter>

So that the first “ParameterValue” changes from it’s default “false” to whatever the value of the variable is (note that the variable in the php is a string, and in the xml is a boolean type). I have looked at suggestions involving awk, and sen and dom without much luck. I am hoping for the simplest way to change this one word in the XML!

James

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1 Answer

  1. Editorial Team

    You are making things too complicated. XML is just a string (text file) that has some formatiing requirements. Just create the string as any other but bear in mind those formatting rules.

    This should do the trick in PHP.

    $xml = <<<EOT
<Parameter>              
     <ParameterName>Method1</ParameterName>                   
     <ParameterDescription>description</ParameterDescription>
EOT

$xml .= '     <ParameterValue type="bool">' . $var . "false</ParameterValue>\n";
$xml .= <<<EOT;
</Parameter> 

<Parameter>  
     <ParameterName>Method2</ParameterName>        
     <ParameterDescription>description</ParameterDescription>  
     <ParameterValue type="bool">true</ParameterValue> 
</Parameter>  

<Parameter> 
     <ParameterName>Method3</ParameterName> 
     <ParameterDescription>description</ParameterDescription> 
     <ParameterValue type="float">0.025</ParameterValue>  
</Parameter> 
EOT;

    You can then save the string to file (adding the other XML stuff that is required!), print it to STDOUT or load it into DOMDocument for further processing. Your choice.

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