API

use TailwindPHP\tw;

$css = tw::generate('<div class="flex items-center p-4 bg-blue-500">');

public static function generate(string|array $input, string $css = '@import "tailwindcss";'): string

use TailwindPHP\tw;

// String input
$css = tw::generate('<div class="flex p-4">');

// String with custom CSS
$css = tw::generate('<div class="flex bg-brand">', '@import "tailwindcss"; @theme { --color-brand: #3b82f6; }');

// Array input with options
$css = tw::generate([
    'content' => '<div class="flex p-4">',
    'css' => '@import "tailwindcss";',
    'minify' => true,
]);

public static function compile(string $css = '@import "tailwindcss";', array $options = []): TailwindCompiler

use TailwindPHP\tw;

// Default Tailwind
$compiler = tw::compile();

// Custom CSS
$compiler = tw::compile('@import "tailwindcss"; @theme { --color-brand: #3b82f6; }');

$css = $compiler->generate('<div class="flex p-4 bg-brand">');

use TailwindPHP\tw;
use const TailwindPHP\POLYFILL_NONE;

// Cache construction state on disk, reused by later requests
$compiler = tw::compile('@import "tailwindcss";', [
    'stateCacheFile' => __DIR__ . '/cache/tailwind-state.php',
]);

// Plain output without fallbacks, e.g. for CSS modules
$compiler = tw::compile('@import "tailwindcss/utilities.css";', [
    'polyfills' => POLYFILL_NONE,
]);
$compiler->generate('<div class="bg-red-500/50">');
// .bg-red-500\/50 { background-color: color-mix(in oklab, var(--color-red-500) 50%, transparent); }
// (with the default, a `#fb2c3680` fallback comes first and color-mix() moves into @supports)

public static function properties(string|array $input, string $css = '@import "tailwindcss";'): array

use TailwindPHP\tw;

tw::properties('p-4');
// ['padding' => 'calc(var(--spacing) * 4)']

tw::properties(['flex', 'items-center', 'p-4']);
// ['display' => 'flex', 'align-items' => 'center', 'padding' => 'calc(var(--spacing) * 4)']

public static function computedProperties(string|array $input, string $css = '@import "tailwindcss";'): array

use TailwindPHP\tw;

tw::computedProperties('p-4');
// ['padding' => '1rem']

tw::computedProperties('text-blue-500');
// ['color' => 'oklch(62.3% .214 259.815)']

tw::computedProperties(['flex', 'items-center', 'gap-4']);
// ['display' => 'flex', 'align-items' => 'center', 'gap' => '1rem']

public static function value(string|array $input, string $css = '@import "tailwindcss";'): ?string

use TailwindPHP\tw;

tw::value('p-4');           // 'calc(var(--spacing) * 4)'
tw::value('text-blue-500'); // 'var(--color-blue-500)'

public static function computedValue(string|array $input, string $css = '@import "tailwindcss";'): ?string

use TailwindPHP\tw;

tw::computedValue('p-4');           // '1rem'
tw::computedValue('text-blue-500'); // 'oklch(62.3% .214 259.815)'
tw::computedValue('gap-4');         // '1rem'

public static function extractCandidates(string $html): array

use TailwindPHP\tw;

tw::extractCandidates('<div class="flex p-4" className="bg-blue-500">');
// ['flex', 'p-4', 'bg-blue-500']

public static function extractCandidatesFromStrings(string $source): array

use TailwindPHP\tw;

$classes = tw::extractCandidatesFromStrings('<?php $wrap = \'p-4 sm:flex\'; $title = "hello world"; ?>');
// ['p-4', 'sm:flex', 'hello', 'world']

$css = tw::compile()->css($classes);

public static function cssMap(string $css = '@import "tailwindcss";'): array

use TailwindPHP\tw;

$map = tw::cssMap();
$map['display: flex'];       // 'flex'
$map['padding: 1rem'];       // 'p-4'
$map['text-align: center'];  // 'text-center'
$map['color: #fff'];         // 'text-white'

public static function minify(string $css): string

use TailwindPHP\tw;

$css = tw::generate('<div class="flex p-4">');
$minified = tw::minify($css);

public static function clearCache(string|bool|null $cache = true): int

use TailwindPHP\tw;

tw::clearCache();                  // default directory
tw::clearCache('/path/to/cache');  // custom directory

public static function colors(string $css = '@import "tailwindcss";'): array

use TailwindPHP\tw;

tw::colors();
// ['red-500' => 'oklch(63.7% .237 25.331)', 'blue-500' => 'oklch(62.3% .214 259.815)', ...]

// With a custom theme
tw::colors('@import "tailwindcss"; @theme { --color-brand: #3b82f6; }');
// [..., 'brand' => '#3b82f6']

public static function breakpoints(string $css = '@import "tailwindcss";'): array

use TailwindPHP\tw;

tw::breakpoints();
// ['sm' => '40rem', 'md' => '48rem', 'lg' => '64rem', 'xl' => '80rem', '2xl' => '96rem']

tw::breakpoints('@import "tailwindcss"; @theme { --breakpoint-xs: 20rem; }');
// ['sm' => '40rem', ..., '2xl' => '96rem', 'xs' => '20rem']

public static function spacing(string $css = '@import "tailwindcss";'): array

use TailwindPHP\tw;

// TailwindCSS 4 uses a single --spacing base value rather than a --spacing-* namespace.
// This returns any custom --spacing-* values defined in the theme.
tw::spacing('@import "tailwindcss"; @theme { --spacing-huge: 10rem; }');
// ['huge' => '10rem']

use TailwindPHP\tw;

// Format 1: string only
tw::properties('p-4');

// Format 2: string + CSS
tw::properties('bg-brand', '@import "tailwindcss"; @theme { --color-brand: #3b82f6; }');

// Format 3: array
tw::properties(['content' => 'p-4', 'css' => '@import "tailwindcss";']);

public function generate(string $content, bool $minify = false): string
public function css(array $candidates, bool $minify = false): string
public function generateExact(string $content, bool $minify = false): string
public function cssExact(array $candidates, bool $minify = false): string
public function extractCandidates(string $html): array
public function extractCandidatesFromStrings(string $source): array
public function properties(string|array $utilities): array
public function computedProperties(string|array $utilities): array
public function value(string $utility): ?string
public function computedValue(string $utility): ?string
public function minify(string $css): string
public function colors(): array
public function breakpoints(): array
public function spacing(): array

use TailwindPHP\tw;

$compiler = tw::compile('@import "tailwindcss"; @theme { --color-brand: #3b82f6; }');

$css        = $compiler->generate('<div class="flex p-4 bg-brand">');
$candidates = $compiler->extractCandidates('<div class="flex p-4 bg-brand">');

$compiler->properties('bg-brand');          // ['background-color' => 'var(--color-brand)']
$compiler->computedProperties('bg-brand');   // ['background-color' => '#3b82f6']
$compiler->value('bg-brand');                // 'var(--color-brand)'
$compiler->computedValue('bg-brand');        // '#3b82f6'

$minified = $compiler->minify($css);

$compiler->colors();        // all color values
$compiler->breakpoints();   // all breakpoint values
$compiler->spacing();       // custom spacing values

use TailwindPHP\tw;

$compiler = tw::compile($themeCss);

foreach ($pages as $slug => $html) {
    $perPageCss[$slug] = $compiler->generateExact($html, true);
}

public function getTheme(): Theme
public function getDesignSystem(): object
public function getCompiled(): array

$compiler->getTheme();        // Theme object with resolved values
$compiler->getDesignSystem(); // Design system: utilities, variants, etc.
$compiler->getCompiled();     // Raw compiled state array

use function TailwindPHP\compile;

$compiled = compile('@import "tailwindcss";');
$css = $compiled['build'](['flex', 'p-4'], true); // minified

use TailwindPHP\tw;

// Default directory: sys_get_temp_dir() . '/tailwindphp'
$css = tw::generate([
    'content' => '<div class="flex p-4">',
    'cache' => true,
]);

// Custom directory + TTL
$css = tw::generate([
    'content' => '<div class="flex p-4">',
    'cache' => '/path/to/cache',
    'cacheTtl' => 3600, // expire after 1 hour
]);