Pros of polyfill-php72

• Provides compatibility for PHP 7.2 features in older PHP versions
• Lightweight and focused on specific PHP 7.2 functionality
• Easy to integrate into projects requiring PHP 7.2 compatibility

Cons of polyfill-php72

• Limited scope compared to css-selector's broader functionality
• May become obsolete as PHP versions are updated
• Doesn't provide CSS-related functionality

Code Comparison

css-selector:

use Symfony\Component\CssSelector\CssSelectorConverter;

$converter = new CssSelectorConverter();
$xpath = $converter->toXPath('div.class');

polyfill-php72:

// No direct equivalent, as it provides PHP 7.2 compatibility
// Example of a polyfilled function:
$result = mb_chr(0x1F600);

css-selector is focused on converting CSS selectors to XPath expressions, while polyfill-php72 provides compatibility for PHP 7.2 features in older PHP versions. The code examples demonstrate their different purposes, with css-selector offering CSS-related functionality and polyfill-php72 providing compatibility for PHP 7.2 functions.

Pros of polyfill-mbstring

• Provides multibyte string support for PHP environments lacking the mbstring extension
• Lightweight and easy to integrate into existing projects
• Improves compatibility across different PHP configurations

Cons of polyfill-mbstring

• Limited to mbstring functionality, while css-selector offers CSS selector parsing
• May have slightly lower performance compared to native mbstring extension
• Requires additional maintenance to keep up with PHP updates

Code Comparison

css-selector:

use Symfony\Component\CssSelector\CssSelectorConverter;

$converter = new CssSelectorConverter();
$xpath = $converter->toXPath('div.class');

polyfill-mbstring:

if (!function_exists('mb_strlen')) {
    function mb_strlen($str, $encoding = null) {
        return \Symfony\Polyfill\Mbstring\Mbstring::mb_strlen($str, $encoding);
    }
}

Summary

While css-selector focuses on converting CSS selectors to XPath expressions, polyfill-mbstring provides multibyte string support for PHP environments. The choice between these libraries depends on the specific needs of your project. css-selector is ideal for working with HTML and XML documents, while polyfill-mbstring is essential for projects requiring consistent multibyte string handling across different PHP configurations.

Pros of polyfill-intl-idn

• Provides IDN (Internationalized Domain Names) support for PHP versions lacking the intl extension
• Enables handling of non-ASCII domain names in applications
• Lightweight solution for IDN functionality without full intl extension

Cons of polyfill-intl-idn

• Limited to IDN functionality, not a full CSS selector implementation
• May have performance overhead compared to native intl extension
• Requires additional configuration and setup for IDN support

Code Comparison

polyfill-intl-idn:

use Symfony\Polyfill\Intl\Idn\Idn;

$ascii = Idn::idn_to_ascii('mañana.com');
$unicode = Idn::idn_to_utf8('xn--maana-pta.com');

css-selector:

use Symfony\Component\CssSelector\CssSelectorConverter;

$converter = new CssSelectorConverter();
$xpath = $converter->toXPath('div.class > p');

The polyfill-intl-idn package focuses on IDN conversion, while css-selector is designed for converting CSS selectors to XPath expressions. They serve different purposes within the Symfony ecosystem, with polyfill-intl-idn addressing internationalization needs and css-selector handling DOM traversal and manipulation.

Pros of polyfill-ctype

• Provides ctype function support for PHP versions lacking native implementations
• Lightweight and focused on a specific functionality
• Easy to integrate into projects requiring ctype functions

Cons of polyfill-ctype

• Limited in scope compared to css-selector's broader functionality
• May become unnecessary as PHP versions advance and include native ctype support
• Doesn't offer advanced string manipulation capabilities

Code Comparison

css-selector:

use Symfony\Component\CssSelector\CssSelectorConverter;

$converter = new CssSelectorConverter();
$xpath = $converter->toXPath('div.class');

polyfill-ctype:

if (!function_exists('ctype_alpha')) {
    function ctype_alpha($text) {
        return is_string($text) && preg_match('/^\p{L}*$/u', $text);
    }
}

Summary

css-selector is a more comprehensive package for parsing CSS selectors and converting them to XPath expressions, while polyfill-ctype focuses on providing ctype function support for older PHP versions. css-selector offers more advanced functionality for web scraping and DOM manipulation, whereas polyfill-ctype is a simple, targeted solution for ensuring ctype functions are available across different PHP environments.

Pros of polyfill-php80

• Provides compatibility for PHP 8.0 features in older PHP versions
• Enables use of newer language constructs without requiring PHP 8.0
• Lightweight and focused on specific PHP 8.0 functionality

Cons of polyfill-php80

• Limited in scope to PHP 8.0 features only
• May become obsolete as PHP versions are updated
• Not directly related to CSS or DOM manipulation

Code Comparison

polyfill-php80:

if (!function_exists('fdiv')) {
    function fdiv($dividend, $divisor) {
        return @($dividend / $divisor);
    }
}

css-selector:

$crawler = $crawler->filter('h1.title');
$crawler = $crawler->filter('body > p');

Summary

polyfill-php80 and css-selector serve different purposes within the Symfony ecosystem. polyfill-php80 focuses on providing PHP 8.0 compatibility for older PHP versions, while css-selector is designed for DOM traversal and manipulation using CSS selectors. The choice between them depends on the specific needs of your project: PHP version compatibility or CSS-based DOM selection.