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highlight_string

Description

Syntax highlighting of a string

Syntax

highlight_string(
    string $string,
    bool $return = false
): string|bool

Parameters

string

The PHP code to be highlighted. This should include the opening tag.

return

Set this parameter to true to make this function return the highlighted code.

Return

If return is set to true, returns the highlighted code as a string instead of printing it out. Otherwise, it will return true on success, false on failure.

Examples

1 · string

<?

$string = '<?

// comment
function myfunction()
{
    $myvariable = "hello";

    echo $myvariable;
}

myfunction();

?>';

highlight_string($string);

?>
<pre><code style="color: #000000"><span style="color: #0000BB">&lt;?

</span><span style="color: #FF8000">// comment
</span><span style="color: #007700">function </span><span style="color: #0000BB">myfunction</span><span style="color: #007700">()
{
    </span><span style="color: #0000BB">$myvariable </span><span style="color: #007700">= </span><span style="color: #DD0000">"hello"</span><span style="color: #007700">;

    echo </span><span style="color: #0000BB">$myvariable</span><span style="color: #007700">;
}

</span><span style="color: #0000BB">myfunction</span><span style="color: #007700">();

</span><span style="color: #0000BB">?&gt;</span></code></pre>

2 · return · false

<?

$string = '<?

// comment
function myfunction()
{
    $myvariable = "hello";

    echo $myvariable;
}

myfunction();

?>';
$return = false;

highlight_string($string, $return);

?>
<pre><code style="color: #000000"><span style="color: #0000BB">&lt;?

</span><span style="color: #FF8000">// comment
</span><span style="color: #007700">function </span><span style="color: #0000BB">myfunction</span><span style="color: #007700">()
{
    </span><span style="color: #0000BB">$myvariable </span><span style="color: #007700">= </span><span style="color: #DD0000">"hello"</span><span style="color: #007700">;

    echo </span><span style="color: #0000BB">$myvariable</span><span style="color: #007700">;
}

</span><span style="color: #0000BB">myfunction</span><span style="color: #007700">();

</span><span style="color: #0000BB">?&gt;</span></code></pre>

3 · return · true

<?

$string = '<?

// comment
function myfunction()
{
    $myvariable = "hello";

    echo $myvariable;
}

myfunction();

?>';
$return = true;

highlight_string($string, $return);

?>

4 · output · return · false

<?

$string = '<?

// comment
function myfunction()
{
    $myvariable = "hello";

    echo $myvariable;
}

myfunction();

?>';
$return = false;

$output = highlight_string($string, $return);

var_export($output);

?>
<pre><code style="color: #000000"><span style="color: #0000BB">&lt;?

</span><span style="color: #FF8000">// comment
</span><span style="color: #007700">function </span><span style="color: #0000BB">myfunction</span><span style="color: #007700">()
{
    </span><span style="color: #0000BB">$myvariable </span><span style="color: #007700">= </span><span style="color: #DD0000">"hello"</span><span style="color: #007700">;

    echo </span><span style="color: #0000BB">$myvariable</span><span style="color: #007700">;
}

</span><span style="color: #0000BB">myfunction</span><span style="color: #007700">();

</span><span style="color: #0000BB">?&gt;</span></code></pre>true

5 · output · return · true

<?

$string = '<?

// comment
function myfunction()
{
    $myvariable = "hello";

    echo $myvariable;
}

myfunction();

?>';
$return = true;

$output = highlight_string($string, $return);

echo $output;

?>
<pre><code style="color: #000000"><span style="color: #0000BB">&lt;?

</span><span style="color: #FF8000">// comment
</span><span style="color: #007700">function </span><span style="color: #0000BB">myfunction</span><span style="color: #007700">()
{
    </span><span style="color: #0000BB">$myvariable </span><span style="color: #007700">= </span><span style="color: #DD0000">"hello"</span><span style="color: #007700">;

    echo </span><span style="color: #0000BB">$myvariable</span><span style="color: #007700">;
}

</span><span style="color: #0000BB">myfunction</span><span style="color: #007700">();

</span><span style="color: #0000BB">?&gt;</span></code></pre>

6 · ini_set

<?

ini_set('highlight.comment', '#ffff00');
ini_set('highlight.default', '#0000ff');
ini_set('highlight.html', '#000000');
ini_set('highlight.keyword', '#00ff00');
ini_set('highlight.string', '#ff0000');

$string = '<?

// comment
function myfunction()
{
    $myvariable = "hello";

    echo $myvariable;
}

myfunction();

?>';

highlight_string($string);

?>
<pre><code style="color: #000000"><span style="color: #0000ff">&lt;?

</span><span style="color: #ffff00">// comment
</span><span style="color: #00ff00">function </span><span style="color: #0000ff">myfunction</span><span style="color: #00ff00">()
{
    </span><span style="color: #0000ff">$myvariable </span><span style="color: #00ff00">= </span><span style="color: #ff0000">"hello"</span><span style="color: #00ff00">;

    echo </span><span style="color: #0000ff">$myvariable</span><span style="color: #00ff00">;
}

</span><span style="color: #0000ff">myfunction</span><span style="color: #00ff00">();

</span><span style="color: #0000ff">?&gt;</span></code></pre>
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