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/**
* Original by Aaron Harun: http://aahacreative.com/2012/07/31/php-syntax-highlighting-prism/
* Modified by Miles Johnson: http://milesj.me
*
* Supports the following:
* - Extends clike syntax
* - Support for PHP 5.3+ (namespaces, traits, generators, etc)
* - Smarter constant and function matching
*
* Adds the following new token classes:
* constant, delimiter, variable, function, package
*/
(function (Prism) {
Prism.languages.php = Prism.languages.extend('clike', {
'keyword': /\b(?:and|or|xor|array|as|break|case|cfunction|class|const|continue|declare|default|die|do|else|elseif|enddeclare|endfor|endforeach|endif|endswitch|endwhile|extends|for|foreach|function|include|include_once|global|if|new|return|static|switch|use|require|require_once|var|while|abstract|interface|public|implements|private|protected|parent|throw|null|echo|print|trait|namespace|final|yield|goto|instanceof|finally|try|catch)\b/i,
'constant': /\b[A-Z0-9_]{2,}\b/,
'comment': {
pattern: /(^|[^\\])(?:\/\*[\s\S]*?\*\/|\/\/.*)/,
lookbehind: true
}
});
Prism.languages.insertBefore('php', 'string', {
'shell-comment': {
pattern: /(^|[^\\])#.*/,
lookbehind: true,
alias: 'comment'
}
});
Prism.languages.insertBefore('php', 'keyword', {
'delimiter': {
pattern: /\?>|<\?(?:php|=)?/i,
alias: 'important'
},
'variable': /\$+(?:\w+\b|(?={))/i,
'package': {
pattern: /(\\|namespace\s+|use\s+)[\w\\]+/,
lookbehind: true,
inside: {
punctuation: /\\/
}
}
});
// Must be defined after the function pattern
Prism.languages.insertBefore('php', 'operator', {
'property': {
pattern: /(->)[\w]+/,
lookbehind: true
}
});
Prism.languages.insertBefore('php', 'string', {
'nowdoc-string': {
pattern: /<<<'([^']+)'(?:\r\n?|\n)(?:.*(?:\r\n?|\n))*?\1;/,
greedy: true,
alias: 'string',
inside: {
'delimiter': {
pattern: /^<<<'[^']+'|[a-z_]\w*;$/i,
alias: 'symbol',
inside: {
'punctuation': /^<<<'?|[';]$/
}
}
}
},
'heredoc-string': {
pattern: /<<<(?:"([^"]+)"(?:\r\n?|\n)(?:.*(?:\r\n?|\n))*?\1;|([a-z_]\w*)(?:\r\n?|\n)(?:.*(?:\r\n?|\n))*?\2;)/i,
greedy: true,
alias: 'string',
inside: {
'delimiter': {
pattern: /^<<<(?:"[^"]+"|[a-z_]\w*)|[a-z_]\w*;$/i,
alias: 'symbol',
inside: {
'punctuation': /^<<<"?|[";]$/
}
},
'interpolation': null // See below
}
},
'single-quoted-string': {
pattern: /'(?:\\[\s\S]|[^\\'])*'/,
greedy: true,
alias: 'string'
},
'double-quoted-string': {
pattern: /"(?:\\[\s\S]|[^\\"])*"/,
greedy: true,
alias: 'string',
inside: {
'interpolation': null // See below
}
}
});
// The different types of PHP strings "replace" the C-like standard string
delete Prism.languages.php['string'];
var string_interpolation = {
pattern: /{\$(?:{(?:{[^{}]+}|[^{}]+)}|[^{}])+}|(^|[^\\{])\$+(?:\w+(?:\[.+?]|->\w+)*)/,
lookbehind: true,
inside: {
rest: Prism.languages.php
}
};
Prism.languages.php['heredoc-string'].inside['interpolation'] = string_interpolation;
Prism.languages.php['double-quoted-string'].inside['interpolation'] = string_interpolation;
// Add HTML support if the markup language exists
if (Prism.languages.markup) {
// Tokenize all inline PHP blocks that are wrapped in <?php ?>
// This allows for easy PHP + markup highlighting
Prism.hooks.add('before-highlight', function (env) {
if (env.language !== 'php' || !/(?:<\?php|<\?)/ig.test(env.code)) {
return;
}
env.tokenStack = [];
env.backupCode = env.code;
env.code = env.code.replace(/(?:<\?php|<\?)[\s\S]*?(?:\?>|$)/ig, function (match) {
var i = env.tokenStack.length;
// Check for existing strings
while (env.backupCode.indexOf('___PHP' + i + '___') !== -1)
++i;
// Create a sparse array
env.tokenStack[i] = match;
return '___PHP' + i + '___';
});
// Switch the grammar to markup
env.grammar = Prism.languages.markup;
});
// Restore env.code for other plugins (e.g. line-numbers)
Prism.hooks.add('before-insert', function (env) {
if (env.language === 'php' && env.backupCode) {
env.code = env.backupCode;
delete env.backupCode;
}
});
// Re-insert the tokens after highlighting
Prism.hooks.add('after-highlight', function (env) {
if (env.language !== 'php' || !env.tokenStack) {
return;
}
// Switch the grammar back
env.grammar = Prism.languages.php;
for (var i = 0, keys = Object.keys(env.tokenStack); i < keys.length; ++i) {
var k = keys[i];
var t = env.tokenStack[k];
// The replace prevents $$, $&, $`, $', $n, $nn from being interpreted as special patterns
env.highlightedCode = env.highlightedCode.replace('___PHP' + k + '___',
"<span class=\"token php language-php\">" +
Prism.highlight(t, env.grammar, 'php').replace(/\$/g, '$$$$') +
"</span>");
}
env.element.innerHTML = env.highlightedCode;
});
}
}(Prism));