add different children to an element in a xml file using php -


i want add children element on xml file :

<test>   <parameter type="double" name="phone_number" />   <parameter type="string" name="name" />   <parameter type="string" name="e-mail" />   ... </test>

i've tried somthing :

$input = simplexml_load_file('new.xml'); $input->test=""; $input->test->addchild("parameter"); $input->test->parameter->addattribute("type", "double"); $input->test->parameter->addattribute("name", "phone_number");  $input->test->addchild("parameter"); $input->test->parameter->addattribute("type", "string"); $input->test->parameter->addattribute("name", "name"); ...

but error message :

warning: simplexmlelement::addattribute() [simplexmlelement.addattribute]: attribute exists

how solve problem?

1st, cant access xml root element wrap xml examle '<xml>'.$yourxml.'</xml>

2nd simplexml doesn't understand parametr tag access. save point added child , modify it

$str = '<xml><test>   <parameter type="double" name="phone_number" />   <parameter type="string" name="name" />   <parameter type="string" name="e-mail" /> </test></xml>';  $input = simplexml_load_string($str); $input->test="";  $child = $input->test->addchild("parameter"); $child->addattribute("type", "double"); $child->addattribute("name", "phone_number");  $child = $input->test->addchild("parameter"); $child->addattribute("type", "string"); $child->addattribute("name", "name");  echo $input->savexml();

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