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13 years ago
I hope it will be helpful for someone:



I spent some time to solve the problem when you query a string with quotes inside. 



Suppose you have:

$parameter = "aaa \"bbb\"";

$domxpath->query("//path[text()=\"".$parameter."\""];



In versions > 5.3.0 there is registerPhpFunctions where you can put an addslashes. But in older version you cannot do it in simple way.



So the solution is to use a concat function. So when you have a substring with " inside, wrap it with '. And when you have a substring with ', then wrap with in ".



The code is:



<?php

$dom = new DOMDocument;

$dom->loadXML("<name>'bla' \"bla\" bla</name>");

$xpath = new DOMXPath($dom);

$nodeList = $xpath->query("//name[text()=concat(\"'bla' \" ,'\"bla\"' ,\" bla\")]");

?>



Below is the function that receives a string and returns a concat pattern for the xpath query.



<?php

    function getPattern_MQ($pattern) {

        // initiating an array of substrings

        $ar = array();

        // points to the current position in a string

        $offset = 0;

        $strlen = strlen($pattern);

        while (true) {

            // find a position of quotes

            $qPos = strpos($pattern, "\"", $offset);

            

            if (!$qPos) {

                // no more quotes

                $leftOver = $offset - $strlen;

                if ($leftOver < 0) {

                    $string = substr($pattern, $leftOver);

                    $ar[] = "\"" . $string . "\"";

                }

                break;

            }

            // add the whole substring before the quotes into the array

            $ar[] = "\"" . substr($pattern, $offset, ($qPos - $offset)) . "\"";

            // add the quotes wrapped with single quot

            $ar[] = "'" . substr($pattern, $qPos, 1) . "'";

            $offset = $qPos + 1;

        }

        // join the array to get: concat("aaa",'"',"bbb",'"');

        $pattern = "concat(''," . join(",", $dynamicPatternsAr) . ")";

        return $pattern;

    }

?>
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