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@ 2015-11-14T22:31:38Z

<?php

function applyHLToSiblings(DOMDocument $D){

    $words[0] = "cart";
    /*
    $words[1] = "car";
    $words[2] = "cartel";
    $words[3] = "art";
    $words[4] = "drug";
    $words[5] = "drugs";
    $words[6] = "rug";
    $words[7] = "rugs";
    */
    
    $mt = function($content) use($D){
        return $D->createTextNode($content);
    };
    
    $ms = function($content = null, $name) use($D){
        $span = $D->createElement("span");
        $span->setAttribute("class", "word$name");
        $content === null ?: $span->appendChild($content);
        return $span;
    };
    
    $ps = function($siblingsContainer, $searchString, $name) use($D, $ms, $mt){
        foreach($siblingsContainer->childNodes as $node){
            if($node instanceof DOMText){
                if(mb_strlen($node->textContent, "UTF-8") >= mb_strlen($searchString)){
                    $o = mb_strpos($node->textContent, $searchString);
                    if($o !== false){
                        $l = mb_strlen($searchString, "UTF-8");
                        $before = mb_substr($node->textContent, 0, $o);
                        $wrap = mb_substr($node->textContent, $o, $l);
                        $after = mb_substr($node->textContent, $o + $l);

                        $after  ? $node->parentNode->insertBefore($mt($after)             , $node->nextSibling) : null;
                                  $node->parentNode->insertBefore($ms($mt($wrap), $name)  , $node->nextSibling);
                        $before ? $node->parentNode->insertBefore($mt($before)            , $node->nextSibling) : null;
                        
                        $node->parentNode->removeChild($node);
                    }
                }
            }
        }
    };
    
    foreach($words as $name => $word)
        $ps($D->documentElement, $word, $name);
        
    
}


$x = new DOMDocument();
$x->loadXML("<data>drugs cartel</data>");
applyHLToSiblings($x);
var_dump($x->saveXML());

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: Optional parameter $content declared before required parameter $name is implicitly treated as a required parameter in /in/OOE7Q on line 20 string(75) "<?xml version="1.0"?> <data>drugs <span class="word0">cart</span>el</data> "

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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