Analysis of curly brace array syntax usage in top PHP packages

parse-log.php

<?php

// parse the output of https://gist.github.com/nikic/b5f811e0423bf051f4492cd6e0c0273e

$contents = file('alternative_array_syntax_usage.txt');
$match = '/home/nikic/package-analysis/sources/';
$matchLen = strlen($match);

$parseErrorMatch = 'Parse error:';
$parseErrorLen = strlen($parseErrorMatch);

$uniqueNamespaces = $uniquePkgs = $uniqueVars = [];
$totalCount = 0;
$lastLine = null;

$checkLine = function (string $line) use ($matchLen, $match, &$totalCount, &$uniqueNamespaces, &$uniquePkgs, &$uniqueVars) {
    if (substr($line, 0, $matchLen) === $match) {
        $rest = substr($line, $matchLen);
        $pkgSlash = strpos($rest, '/', 1);
        $srcSlash = strpos($rest, '/', $pkgSlash + 1);
        $namespace = substr($rest, 0, $pkgSlash);
        $package = substr($rest, $pkgSlash + 1, $srcSlash - $pkgSlash - 1);
        $packageFullname = $namespace . '/' . $package;
        $totalCount++;

        if (!isset($uniqueNamespaces[$namespace])) {
            $uniqueNamespaces[$namespace] = 1;
        } else {
            $uniqueNamespaces[$namespace] += 1;
        }

        if (!isset($uniquePkgs[$packageFullname])) {
            $uniquePkgs[$packageFullname] = 1;
        } else {
            $uniquePkgs[$packageFullname] += 1;
        }
    } else {
        $curlyPos = strpos($line, '{');

        if ($curlyPos !== false) {
            $var = trim(substr($line, 0, $curlyPos));

            if (!isset($uniqueVars[$var])) {
                $uniqueVars[$var] = 1;
            } else {
                $uniqueVars[$var] += 1;
            }
        }
    }
};

foreach($contents as $line) {
    if (substr($line, 0, $parseErrorLen) === $parseErrorMatch) {
        $lastLine = null;
        continue;
    }

    if ($lastLine !== null) {
        $checkLine($lastLine);
    }

    $lastLine = $line;
}

if ($lastLine !== null) {
    $checkLine($lastLine);
}

echo count($uniqueNamespaces) . ' namespaces with curly brace uses' . PHP_EOL;
echo count($uniquePkgs) . ' packages with curly brace uses' . PHP_EOL;
echo 'Total uses in top 2K packages: ' . $totalCount . PHP_EOL;

arsort($uniquePkgs);

$top15 = $top25 = $twoOrLess = $fourOrLess = 0;
$i = 0;

foreach ($uniquePkgs as $key => $val) {
    if ($key !== 'johnpbloch/wordpress-core' && $key !== 'tecnick.com/tcpdf') {
        // don't count duplicate projects
        $i++;
    }

    if ($i <= 15) {
        $top15 += $val;
    }

    if ($i <= 25) {
        $top25 += $val;
    }

    if ($val <= 4) {
        $fourOrLess++;
    }

    if ($val <= 2) {
        $twoOrLess++;
    }
}

echo $top15 . ' uses in 15 unique projects' . PHP_EOL;
echo $top25 . ' uses in 25 unique projects' . PHP_EOL;
echo $fourOrLess . ' projects have 4 or fewer usages' . PHP_EOL;
echo $twoOrLess . ' projects only have 1 or 2 usages' . PHP_EOL;

echo PHP_EOL;
var_export($uniquePkgs);
echo PHP_EOL . PHP_EOL;

arsort($uniqueVars);
echo count($uniqueVars) . ' unique variables:' . PHP_EOL;
var_export($uniqueVars);

results.txt

75 namespaces with curly brace uses
89 packages with curly brace uses
Total uses in top 2K packages: 2217
1828 uses in 15 unique projects
2036 uses in 25 unique projects
53 projects have 4 or fewer usages
37 projects only have 1 or 2 usages

array (
  'james-heinrich/getid3' => 299,
  'mpdf/mpdf' => 231,
  'phpoffice/phpexcel' => 219,
  'roots/wordpress' => 182,
  'johnpbloch/wordpress-core' => 182,
  'milon/barcode' => 89,
  'lukasreschke/id3parser' => 78,
  'tecnickcom/tcpdf' => 74,
  'tecnick.com/tcpdf' => 74,
  'yiisoft/yii' => 64,
  'picqer/php-barcode-generator' => 63,
  'squizlabs/php_codesniffer' => 56,
  'pear/pear' => 55,
  'phing/phing' => 46,
  'campaignmonitor/createsend-php' => 40,
  'georgringer/news' => 38,
  'behat/transliterator' => 38,
  'lsolesen/pel' => 37,
  'zendframework/zendframework1' => 37,
  'dflydev/markdown' => 22,
  'michelf/php-markdown' => 21,
  'magento/zendframework1' => 18,
  'adoy/fastcgi-client' => 17,
  'phphleb/framework' => 14,
  'phphleb/hleb' => 14,
  'parsecsv/php-parsecsv' => 14,
  'zendframework/zend-json' => 14,
  'typo3/cms' => 12,
  'typo3/cms-core' => 12,
  'pear/console_getopt' => 11,
  'zendframework/zend-barcode' => 9,
  'mso/idna-convert' => 7,
  'braintree/braintree_php' => 6,
  'cakephp/cakephp' => 6,
  'typo3fluid/fluid' => 6,
  'leafo/lessphp' => 5,
  'ezyang/htmlpurifier' => 4,
  'greenlion/php-sql-parser' => 4,
  'ronanguilloux/isocodes' => 4,
  'simplepie/simplepie' => 4,
  'zendframework/zend-code' => 4,
  'amazonwebservices/aws-sdk-for-php' => 4,
  'neitanod/forceutf8' => 4,
  'globalcitizen/php-iban' => 3,
  'khanamiryan/qrcode-detector-decoder' => 3,
  'codeigniter/framework' => 3,
  'drupal/core' => 3,
  'ulrichsg/getopt-php' => 3,
  'zendframework/zend-validator' => 3,
  'teamtnt/tntsearch' => 3,
  'electrolinux/phpquery' => 3,
  'propel/propel' => 3,
  'apache/thrift' => 2,
  'mikey179/vfsstream' => 2,
  'phpdocumentor/phpdocumentor' => 2,
  'abraham/twitteroauth' => 2,
  'acquia/lightning' => 2,
  'inacho/php-credit-card-validator' => 2,
  'cakephp/cakephp-codesniffer' => 2,
  'packaged/thrift' => 2,
  'windwalker/structure' => 2,
  'hybridauth/hybridauth' => 2,
  'zendframework/zend-view' => 2,
  'theorchard/monolog-cascade' => 2,
  'pear/pear-core-minimal' => 2,
  'fzaninotto/faker' => 2,
  'xamin/handlebars.php' => 2,
  'helios-ag/fm-elfinder-php-connector' => 1,
  'snc/redis-bundle' => 1,
  'jakub-onderka/php-parallel-lint' => 1,
  'mrclay/minify' => 1,
  'besimple/soap-client' => 1,
  'netresearch/jsonmapper' => 1,
  'pear/xml_util' => 1,
  'typo3/phar-stream-wrapper' => 1,
  'magento/magento2-functional-testing-framework' => 1,
  'adodb/adodb-php' => 1,
  'icanboogie/inflector' => 1,
  'fileeye/mimemap' => 1,
  'icecave/repr' => 1,
  'akamai-open/edgegrid-client' => 1,
  'mk-j/php_xlsxwriter' => 1,
  'piwik/piwik-php-tracker' => 1,
  'silverstripe/framework' => 1,
  'fluidtypo3/vhs' => 1,
  'cakephp/plugin-installer' => 1,
  'studio-42/elfinder' => 1,
  'topthink/framework' => 1,
  'mayflower/php-codebrowser' => 1,
)

249 unique variables:
array (
  '$string' => 239,
  '$code' => 197,
  '$c' => 171,
  '$col' => 75,
  '$var' => 72,
  '$Bytestring' => 64,
  '$data' => 59,
  '$chrs' => 54,
  '$Header4Bytes' => 48,
  '$seq' => 44,
  '$value' => 44,
  '$recordData' => 42,
  '$utf8' => 42,
  '$tag' => 39,
  '$this->formula' => 35,
  '$SyncPattern1' => 32,
  '$text' => 27,
  '$str' => 27,
  '$header' => 26,
  '$xclrValue' => 24,
  '$hex' => 20,
  '$seq[1]' => 17,
  '$numberstring' => 16,
  '$token' => 16,
  '$binarypointnumber' => 15,
  '$byteword' => 15,
  '$formula' => 15,
  '$bytes' => 14,
  '$pair' => 13,
  '$path' => 13,
  '$footer' => 12,
  '$utf16' => 12,
  '$bit' => 12,
  '$url' => 11,
  '$name' => 11,
  '$input' => 11,
  '$BMPpixelData' => 10,
  '$pString' => 10,
  '$ts[\'col\']' => 10,
  '$col1' => 10,
  '$bitword' => 9,
  '$asciidata' => 9,
  '$chr[$char]' => 9,
  '$colour' => 9,
  '$dict' => 8,
  '$stops[$i][\'col\']' => 8,
  '$arg' => 8,
  '$encoded' => 8,
  '$frame_name' => 8,
  '$lucifer[0]' => 8,
  '$pb[\'col\']' => 8,
  '$strPath' => 8,
  '$hash' => 8,
  '$id3v1tag' => 8,
  '$framedata' => 8,
  '$parsedFrame[\'frame_name\']' => 8,
  '$this->pdfdata' => 8,
  '$utf8text' => 7,
  '$line' => 7,
  '$ISOtime' => 7,
  '$chars' => 6,
  '$tokens[$stackPtr][\'content\']' => 6,
  '$head4' => 6,
  '$dom[$key][\'value\']' => 6,
  '$buffer_4k' => 6,
  '$version' => 6,
  '$this->bytes' => 5,
  '$rowDatum' => 5,
  '$firstBit' => 5,
  '$sh[\'col\']' => 5,
  '$key' => 5,
  '$METAeventData' => 5,
  '$p' => 5,
  '$buffer' => 5,
  '$raw' => 4,
  '$attr[\'size\']' => 4,
  '$generate_url' => 4,
  '$complexNumber' => 4,
  '$filename' => 4,
  '$LAMEtocData' => 4,
  '$binstring' => 4,
  '$functionName' => 4,
  '$ThisWord' => 4,
  '$this->bodyBackgroundColor' => 4,
  '$isbn13' => 4,
  '$package[\'platform\'][$file]' => 4,
  '$ent' => 4,
  '$dir' => 4,
  '$base' => 4,
  '$number' => 4,
  '$PCD_data_Cr' => 4,
  '$PCD_data_Cb' => 4,
  '$wavpackheader' => 4,
  '$chr[$char_space]' => 4,
  '$slug' => 4,
  '$upce_code' => 4,
  '$uri' => 4,
  '$details[$side][\'c\']' => 4,
  '$chr[$char_bar]' => 4,
  '$frame_remainingdata' => 4,
  '$entry' => 4,
  '$href' => 4,
  '$rgb' => 3,
  '$bban' => 3,
  '$formulaData' => 3,
  '$cor' => 3,
  '$this->_compile_' => 3,
  '$ttaheader' => 3,
  '$matches[3]' => 3,
  '$Pattern' => 3,
  '$pathname' => 3,
  '$variable' => 3,
  '$argsString' => 3,
  '$original_text' => 3,
  '$comment' => 3,
  '$function' => 3,
  '$method' => 3,
  '$next4' => 3,
  '$fourbit' => 3,
  '$majver' => 3,
  '$matches[2]' => 3,
  '$element' => 2,
  '$trackingNumber' => 2,
  '$root' => 2,
  '$versioncomponents[2]' => 2,
  '$opt[1]' => 2,
  '$transparency' => 2,
  '$outerPad' => 2,
  '$spec' => 2,
  '$tracking_number' => 2,
  '$keyDigest' => 2,
  '$innerPad' => 2,
  '$result' => 2,
  '$this->buffer' => 2,
  '$signature' => 2,
  '$built' => 2,
  '$methodName' => 2,
  '$memberName' => 2,
  '$hs' => 2,
  '$PCD_data_Y1' => 2,
  '$platform' => 2,
  '$currName' => 2,
  'static::$validationKeys' => 2,
  '$hetu' => 2,
  '$t' => 2,
  '$sb' => 2,
  '$match[1]' => 2,
  '$tmp' => 2,
  '$argument' => 2,
  '$match[2]' => 2,
  '$contentLines[$contentLineIndex + 1]' => 2,
  '$file[\'attribs\'][\'name\']' => 2,
  '$isbn10' => 2,
  '$quotedValue' => 2,
  '$DirectoryRecordData' => 2,
  '$hdr_data' => 2,
  '$prepend' => 2,
  '$PCD_data_Y2' => 2,
  '$attrib' => 2,
  '$matches[1]' => 2,
  '$all' => 2,
  '$args[0]' => 2,
  '$part' => 2,
  '$_hl_excluded_key' => 2,
  '$secret_key' => 2,
  '$workString' => 2,
  '$operand' => 2,
  '$time' => 2,
  '$rowReference' => 2,
  '$columnReference' => 2,
  '$condition' => 2,
  '$tValue' => 2,
  '$stroke' => 2,
  '$styleSettings' => 2,
  '$hl_val_address' => 2,
  '$dynamicRuleType' => 2,
  '$subData' => 2,
  '$matches[0]' => 2,
  '$token[\'content\']' => 2,
  '$content' => 2,
  '$this->_stream' => 1,
  '$deletefilemessage' => 1,
  '$ArrayPath' => 1,
  '$formulaStructure' => 1,
  '$atts[\'platform\']' => 1,
  '$BlockData' => 1,
  '$bar' => 1,
  '$ISOheader' => 1,
  '$options[\'percent_pad\']' => 1,
  '$check' => 1,
  '$md5' => 1,
  '$type' => 1,
  '$ActualFilenameNoExt' => 1,
  '$email' => 1,
  '$classname' => 1,
  '$resp[\'content\']' => 1,
  '$child' => 1,
  '$domain' => 1,
  '$strPathname' => 1,
  '$drive' => 1,
  '$d' => 1,
  '$characters' => 1,
  '$PatternFilenameNoExt' => 1,
  '$param[\'comment\']' => 1,
  '$subPathName' => 1,
  '$caption' => 1,
  '$tags' => 1,
  '$relative' => 1,
  '$rule' => 1,
  '$newColumn' => 1,
  '$max' => 1,
  '$param' => 1,
  '$beforeColumn' => 1,
  '$stringRepresentation' => 1,
  '$lpData' => 1,
  '$this->data' => 1,
  '$operand1' => 1,
  '$operand2' => 1,
  '$pValue' => 1,
  '$package[\'version\']' => 1,
  '$subProp[1]' => 1,
  '$this->_version' => 1,
  '$col_ref' => 1,
  '$sql' => 1,
  '$funcName' => 1,
  '$camelCapsPart' => 1,
  '$opt' => 1,
  '$xmlFile' => 1,
  '$next_option_rest' => 1,
  '$wsTitle' => 1,
  '$depdb[\'_version\']' => 1,
  '$newRow' => 1,
  '$this->encryptionKey' => 1,
  '$beforeRow' => 1,
  '$TagHeaderTest' => 1,
  '$metablockheader' => 1,
  '$os' => 1,
  '$mode' => 1,
  '$options[\'fraction_pad\']' => 1,
  '$owner_rc4_key' => 1,
  '$cOTLdata[$c][\'group\']' => 1,
  '$file' => 1,
  '$components[\'path\']' => 1,
  '$cOTLdata[$nc][\'group\']' => 1,
  '$chunkOTLdata[\'group\']' => 1,
  '$params[1]' => 1,
  '$info[\'arg\']' => 1,
  '$OTLdata[\'group\']' => 1,
  '$ascii' => 1,
)