YavorK · June 1, 2023 17:21 · YavorK · Mar 8, 2023
diff --git a/template_engine.php b/template_engine.php
 <?php

 /**
 * Use
 * <?= fragment_start('this_is_my_fragment') ?>
 * Fragment content <?= $with_variables_and_stuff ?>
 * <?= fragment_end('this_is_my_fragment') ?>
 */

 /**
 * Parses a php view to a HTML string
 * @param $path - relative path to the view
 * @param $data array ['name' => 'Peter']
 * @param null $fragmentName If you specify a fragment name this function will return only the fragment. Will throw error if the fragment is not found.
 * @return string the parsed HTML
 * @throws Exception
 */
 function parseView($path, $data, $fragmentName = null) {
    if($fragmentName){
        global $__nrj__fragment__name__;
        $__nrj__fragment__name__ = 'this_is_my_fragment';
        $fragmentStartString = fragment_start($fragmentName);
        $fragmentEndString =  fragment_end($fragmentName);
    }
    ob_start();


    extract($data);
    include ($path);

    $result =  ob_get_clean();

    // if user wants a fragment try to "cut out" the fragment out of the
    // whole view
    if($fragmentName) {
        // position of the first letter of the Start Fragment / (or End Fragment)
        // "abc x{fragmentStart:this_is_my_fragment}x  " position will be 4 "abc " are 4 symbols
        $fragment_start_position = stripos($result, $fragmentStartString );
        $fragment_end_position = stripos($result, $fragmentEndString);


        if($fragment_start_position === false){
            throw new Exception(
                "Start for fragment: '$fragmentName' was not defined in the template: ".$path);
        }
        if($fragment_end_position === false){
            throw new Exception(
                "End for fragment: '$fragmentName' was not defined in the template: ".$path);
        }

        $end_of_start_string = $fragment_start_position + mb_strlen($fragmentStartString);
        $fragment_substring = substr($result, $end_of_start_string,
            $fragment_end_position - $end_of_start_string);
        if(!$fragment_substring) {
            throw new Exception("Failed to extract fragment");
        }
        $result = $fragment_substring;
    }

    return $result;
 }

 /**
 * generate a fragment name tag if there is a fragment
 * @param $name
 * @return string
 */
 function fragment_start($name) {
    global $__nrj__fragment__name__;
    if(($__nrj__fragment__name__)) {
        return 'xxx{fragmentStart:'.$name.'}xxx';
    }
    return '';
 }
 function fragment_end($name) {
    global $__nrj__fragment__name__;
    if(isset($__nrj__fragment__name__)) {
        return 'xxx{fragmentEnd:' . $name . '}xxx';
    }
    return '';
 }

 echo parseView('./view1.php',
    ['name' => 'World'],
 'this_is_my_fragment');
diff --git a/view1.php b/view1.php
 <html>
 <head><title></title></head>
 <body>
 abc <?= "Hello there, dear $name!"; ?>
 <?= fragment_start('this_is_my_fragment') ?>
 This is a fragment, dear <?= $name ?>!
 <?= fragment_end('this_is_my_fragment') ?>
 </body>
 </html>
	<?php

	/**
	* Use
	* <?= fragment_start('this_is_my_fragment') ?>
	* Fragment content <?= $with_variables_and_stuff ?>
	* <?= fragment_end('this_is_my_fragment') ?>
	*/

	/**
	* Parses a php view to a HTML string
	* @param $path - relative path to the view
	* @param $data array ['name' => 'Peter']
	* @param null $fragmentName If you specify a fragment name this function will return only the fragment. Will throw error if the fragment is not found.
	* @return string the parsed HTML
	* @throws Exception
	*/
	function parseView($path, $data, $fragmentName = null) {
	if($fragmentName){
	global $__nrj__fragment__name__;
	$__nrj__fragment__name__ = 'this_is_my_fragment';
	$fragmentStartString = fragment_start($fragmentName);
	$fragmentEndString = fragment_end($fragmentName);
	}
	ob_start();


	extract($data);
	include ($path);

	$result = ob_get_clean();

	// if user wants a fragment try to "cut out" the fragment out of the
	// whole view
	if($fragmentName) {
	// position of the first letter of the Start Fragment / (or End Fragment)
	// "abc x{fragmentStart:this_is_my_fragment}x " position will be 4 "abc " are 4 symbols
	$fragment_start_position = stripos($result, $fragmentStartString );
	$fragment_end_position = stripos($result, $fragmentEndString);


	if($fragment_start_position === false){
	throw new Exception(
	"Start for fragment: '$fragmentName' was not defined in the template: ".$path);
	}
	if($fragment_end_position === false){
	throw new Exception(
	"End for fragment: '$fragmentName' was not defined in the template: ".$path);
	}

	$end_of_start_string = $fragment_start_position + mb_strlen($fragmentStartString);
	$fragment_substring = substr($result, $end_of_start_string,
	$fragment_end_position - $end_of_start_string);
	if(!$fragment_substring) {
	throw new Exception("Failed to extract fragment");
	}
	$result = $fragment_substring;
	}

	return $result;
	}

	/**
	* generate a fragment name tag if there is a fragment
	* @param $name
	* @return string
	*/
	function fragment_start($name) {
	global $__nrj__fragment__name__;
	if(($__nrj__fragment__name__)) {
	return 'xxx{fragmentStart:'.$name.'}xxx';
	}
	return '';
	}
	function fragment_end($name) {
	global $__nrj__fragment__name__;
	if(isset($__nrj__fragment__name__)) {
	return 'xxx{fragmentEnd:' . $name . '}xxx';
	}
	return '';
	}

	echo parseView('./view1.php',
	['name' => 'World'],
	'this_is_my_fragment');
	<html>
	<head><title></title></head>
	<body>
	abc <?= "Hello there, dear $name!"; ?>
	<?= fragment_start('this_is_my_fragment') ?>
	This is a fragment, dear <?= $name ?>!
	<?= fragment_end('this_is_my_fragment') ?>
	</body>
	</html>