PHP include HTML and echo out variable

Question

I am working on a script with templates. So I have this PHP code:

<?php
$string = "TEST";
echo(file_get_contents('themes/default/test.html'));
?>

And I have this HTML (the test.html file):

<html>
  <p>{$string}</p>
</html>

How can I make PHP actually display the variable inside the curly brackets? At the moment it displays {$string}.

P.S: The string might also be an object with many many variables, and I will display them like that: {$object->variable}.

P.S 2: The HTML must stay as it is. This works:

$string = "I'm working!"
echo("The string is {$string}");

I need to use the same principle to display the value.

Possible duplicate of PHP replace string after using file_get_contents — mplungjan
– mplungjan, Commented Jan 18, 2016 at 10:48
Checkout this Question on SO: stackoverflow.com/questions/15065387/… — Saqib Amin
– Saqib Amin, Commented Jan 18, 2016 at 10:48
e.g. echo str_replace('{$string}', $string, file_get_contents('themes/default/test.html')); — mplungjan
– mplungjan, Commented Jan 18, 2016 at 10:50
Thank you, guys, for the links. The thing is the string might be retrieved from an object with many many variables, so I need to use it like in my example. — Sergiu N
– Sergiu N, Commented Jan 18, 2016 at 10:51

Saqib Amin · Accepted Answer · 2016-01-18 10:58:31Z

1

You can use the following code to achieve the desired result:

<?php
$string = "TEST";
$doc = file_get_contents('themes/default/test.html'));
echo preg_replace('/\{([A-Z]+)\}/', "$$1", $doc);
?>

P.S. Please note that it will assume that every string wrapped in { } has a variable defined. So No error checking is implemented in the code above. furthermore it assumes that all variables have only alpha characters.

answered Jan 18, 2016 at 10:58

Saqib Amin

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1 Comment

mplungjan Over a year ago

Perhaps mention that $$1 will replace whatever is found in {} with the contents of the var found

Alex · Accepted Answer · 2016-01-18 10:48:48Z

0

If it is possible to save your replacees in an array instead of normal variables you could use code below. I'm using it with a similar use case.

function loadFile($path) {
    $vars = array();
    $vars['string'] = "value";

    $patterns = array_map("maskPattern", array_keys($vars));
    $result = str_replace($patterns, $vars, file_get_contents($path));

    return $result;
}

function maskPattern($value) {
    return "{$" . $value . "}";
}

answered Jan 18, 2016 at 10:48

Alex

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1 Comment

Sergiu N Over a year ago

Yes, but I might have an object with many many variables, so I will need to display them like that: {$object->variable}, so this will not work.

Ikhlak S. · Accepted Answer · 2016-01-18 10:51:00Z

0

All you PHP must be in a <?php ?> block like this:

<html>
  <p><?php echo "{" . $string . "}";?></p>
</html>

edited Jan 18, 2016 at 10:51

answered Jan 18, 2016 at 10:47

Ikhlak S.

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11 Comments

mplungjan Over a year ago

But it is not in PHP, it is in HTML

Sergiu N Over a year ago

Hi! Yes, that's a simple solution, but I have to only use brackets and variable inside. I've seen a script that displayed the variables like in my example before, so I know it's possible.

Ikhlak S. Over a year ago

@mplungjan i don't get it :/.

Saqib Amin Over a year ago

@user3284463 He is trying to build a mini-templating engine that will automatically replace values wrapped in {} with variables (if they exist)

mplungjan Over a year ago

The {$string}] is in the html file he gets using file_get

|

Babitha · Accepted Answer · 2016-01-18 10:59:11Z

0

If you know the variable to replace in the html you can use the PHP function 'str_replace'. For your script,

$string = "TEST";

$content = file_get_contents('test.html');
$content = str_replace('{$string}', $string, $content);

echo($content);

answered Jan 18, 2016 at 10:59

Babitha

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1 Comment

Sergiu N Over a year ago

I don't know it. It might be a $variable type or retrieved from an object like that: $object->variable.

devpro · Accepted Answer · 2016-01-18 11:06:42Z

0

It's simple to use echo.

<html>
  <p>{<?php echo $string;?>}</p>
</html>

UPDATE 1:

After reading so many comments, found a solution, try this:

$string = "TEST";

$template = file_get_contents('themes/default/test.html', FILE_USE_INCLUDE_PATH);

$page = str_replace('{$string}',$string,$template);

echo $page;

edited Jan 18, 2016 at 11:06

answered Jan 18, 2016 at 10:45

devpro

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3 Comments

mplungjan Over a year ago

Inside themes/default/test.html there is a {$string} it will of course not be rendered as PHP when it is retrieved using file_get

Sergiu N Over a year ago

I know, but I have to use it like that. I've seen a script before that displayed variables as in my example, but I don't know how to do it. I do not have to use file_get_contents, but I have to retrieve the content somehow.

Sergiu N Over a year ago

Yes, it's working, but I still need to know the variables when I'm reading the HTML.

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