PHP implements a simple source code syntax highlighting function-PHP Tutorial-php.cn

PHP implements a simple source code syntax highlighting function

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Release： 2016-07-25 08:45:32

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A simple syntax highlighting function implemented in PHP. Note: This function is relatively simple in design and may not be able to highlight certain syntaxes. You can expand the function of this function yourself

function syntax_highlight($code ){
// this matches --> "foobar" <--
$code = preg_replace(
'/"(.*?)"/U',
'"$1"', $code
);
// highlight functions and other structures like --> function foobar() <---
$code = preg_replace(
'/(s)b(.*?)((b|s)()/U',
'$1$2$3',
$code
);
// Match comments (like /* */):
$code = preg_replace(
'/(//)(.+)s/',
'$0',
$code
);
$code = preg_replace(
'/(/*. *?*/)/s',
'$0',
$code
);
// highlight braces:
$code = preg_replace('/((|[|{|}|]|)|->)/', '$1
// highlight variables $foobar
$code = preg_replace(
'/($[a-zA-Z0-9_]+)/', '$1', $code

);

/* The b in the pattern indicates a word boundary, so only the distinct

** word "web" is matched, and not a word partial like "webbing" or "cobweb"

*/

// special words and functions

$code = preg_replace(

'/b(print|echo|new|function)b/',

'$1', $code

);

return $code;

}

/*example-start*/

/*

** Create some example PHP code :

*/

$example_php_code = '

// some code comment:

$example = "foobar";

print $_SERVER["REMOTE_ADDR"];

$array = array(1, 2, 3, 4 , 5);

function example_function($str) {

// reverse string

echo strrev($obj);

}

print example_function("foo");

/*

** A multiple line comment

*/

print "Something: " . $example;';

// output the formatted code:

print '
';</li> <li>print syntax_highlight($example_php_code);</li> <li>print '
';

/*example-end*/