将/ e修饰符替换为preg_replace_callback的问题

Question

I am having some trouble with replacing preg_replace with /e modifier to preg_replace_callback in this function:

    private function parseFunctions() {
    // replaces includes ( {include file="..."} )
    while( preg_match( "/" .$this->leftDelimiterF ."include file=\"(.*)\.(.*)\""
                       .$this->rightDelimiterF ."/isUe", $this->template) )
    {
        $this->template = preg_replace( "/" .$this->leftDelimiterF ."include file=\"(.*)\.(.*)\""
                                        .$this->rightDelimiterF."/isUe",
                                        "file_get_contents(\$this->templateDir.'\\1'.'.'.'\\2')",
                                        $this->template );
    }


    // deletes comments from the template files
    $this->template = preg_replace( "/" .$this->leftDelimiterC ."(.*)" .$this->rightDelimiterC ."/isUe",
                                    "", $this->template );
    }

Can you help me with this?

EDIT:

I managed to fix the second one, but the other

{
        $this->template = preg_replace_callback( "/" .$this->leftDelimiterF ."include file=\"(.*)\.(.*)\""
                                        .$this->rightDelimiterF."/isU",
                                        function(){$replacement="file_get_contents(\$this->templateDir.'\\1'.'.'.'\\2')";
                                        return $replacement;},
                                        $this->template );
    }

did not work. I got following error message:

file_get_contents($this->templateDir.'\1'.'.'.'\2') file_get_contents($this->templateDir.'\1'.'.'.'\2') file_get_contents($this->templateDir.'\1'.'.'.'\2') file_get_contents($this->templateDir.'\1'.'.'.'\2') file_get_contents($this->templateDir.'\1'.'.'.'\2') file_get_contents($this->templateDir.'\1'.'.'.'\2')

I am still relatively new to php so i am not sure how to handle this issue.

Answer 1

Finally I understood what you are trying to do. The callback function should receive an array of all the matches or a single match (depending on what was found). So it would look something like this: $this->template = preg_replace_callback( "/" .$this->leftDelimiterF ."include file=\"(.*)\.(.*)\"".$this->rightDelimiterF."/isU", function($match){ $replacement="file_get_contents(\$this->match.'\\1'.'.'.'\\2')"; return $replacement;}, this->template ); If you need some outside variable inside the anonymous function then declare the callback function as function($match) use ($varname)