XPath Variable In SimpleXML With Multiple Values In Predecate

Question

I am working with XML that has a node titled <SCOPE>.
If the Scope is equal to "teaching," the code follows one path; if the Scope is not equal to "teaching," the code follows another path. I would like to also check to see if Scope is equal to either.
Is this possible in using a variable?
Here is my code (below). However, this returns no results, whereas using the separate values (either "Teaching" or "Scholarship/Research" return values).

$strXpathVar = "Teaching|Scholarship/Research"; $xml_awards_honor_scope_all = $xml_award_honor[0]->xpath('a:AWARDHONOR[a:SCOPE="'.$strXpathVar.'"]');

'a:AWARDHONOR[a:SCOPE="Teaching" or a:SCOPE="Scholarship/Research"]' — LMC
– LMC, Commented Jul 27, 2021 at 18:41

ThW · Accepted Answer · 2021-07-29 12:43:46Z

2

The | allows to combine multiple Xpath expressions. So this is possible.

$scopes = ["Teaching", "Scholarship/Research"]; $xml_awards_honor_scope_all = $xml_award_honor[0]->xpath( 'a:AWARDHONOR[a:SCOPE="'.$scopes[0].'"]|a:AWARDHONOR[a:SCOPE="'.$scopes[1].'"]' );

However the conditions support operators like or. Most of the time a better solutition would be like this:

$scopes = ["Teaching", "Scholarship/Research"]; $xml_awards_honor_scope_all = $xml_award_honor[0]->xpath( 'a:AWARDHONOR[a:SCOPE="'.$scopes[0].'" or a:SCOPE="'.$scopes[1].'"]' );

answered Jul 29, 2021 at 12:43

ThW

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5 Comments

buck1112 Over a year ago

If you don't know how many terms will be in the $scopes array, would it be possible to write a condition that checked each term in the $scopes array?

buck1112 Over a year ago

In other words, would it be possible to write a condition that would compare SCOPE one time to all elements in the array?

ThW Over a year ago

Generate the expression in a loop (it is a string), make sure that the words do not include a quote char.

buck1112 Over a year ago

Would I somehow generate the entire expression earlier in the script, or plug in the string into this expression?

ThW Over a year ago

You build the expression up as a variable using string operators and functions. Then you use the variable.

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