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Safe Performance Middleware for NexSouk.com

Ivan Paramanandam

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php


	`<?php`
	`<?php`
	`// Safe Performance Middleware for NexSouk.com`
	`ob_start(function ($buffer) {`

	`// 1. Preload critical font only if head exists (non-breaking)`
	`$buffer = preg_replace(`
	`'/<head>/i',`
	`"<head>\n" .`
	`"<link rel='preload' href='/assets/fonts/your-font.woff2' as='font' type='font/woff2' crossorigin>\n",`
	`$buffer`
	`);`

	`// 2. Ensure font-display: swap (optional: only if it's present)`
	`$buffer = str_replace("font-display: optional;", "font-display: swap;", $buffer);`

	`// 3. Add lazy-loading to <img> tags (only if loading attribute is missing)`
	`$buffer = preg_replace_callback('/<img\s+[^>]*>/i', function ($match) {`
	`$imgTag = $match[0];`
	`if (stripos($imgTag, 'loading=') === false) {`
	`return preg_replace('/<img/i', '<img loading="lazy"', $imgTag);`
	`}`
	`return $imgTag;`
	`}, $buffer);`

	`// 4. Safe WebP enhancement – only if WebP file exists`
	`$buffer = preg_replace_callback('/<img\s[^>]src="([^"]+\.(jpg\|jpeg\|png))"[^>]>/i', function ($matches) {`
	`$originalTag = $matches[0];`
	`$src = $matches[1];`
	`$webp = preg_replace('/\.(jpg\|jpeg\|png)$/i', '.webp', $src);`
	`$webpPath = $_SERVER['DOCUMENT_ROOT'] . $webp;`

	`if (file_exists($webpPath)) {`
	`return "<picture>`
	`<source srcset=\"$webp\" type=\"image/webp\">`
	`$originalTag`
	`</picture>";`
	`}`
	`return $originalTag; // Leave original if WebP not available`
	`}, $buffer);`

	`return $buffer;`
	`});`

	`// 5. Set safe, long cache headers (non-invasive, helps efficiency)`
	`if (!headers_sent()) {`
	`header("Cache-Control: public, max-age=31536000, immutable");`
	`header("Vary: Accept-Encoding");`
	`}`
	`?>`

<?php
// Safe Performance Middleware for NexSouk.com
ob_start(function ($buffer) {

    // 1. Preload critical font only if head exists (non-breaking)
    $buffer = preg_replace(
        '/<head>/i',
        "<head>\n" .
        "<link rel='preload' href='/assets/fonts/your-font.woff2' as='font' type='font/woff2' crossorigin>\n",
        $buffer
    );

    // 2. Ensure font-display: swap (optional: only if it's present)
    $buffer = str_replace("font-display: optional;", "font-display: swap;", $buffer);

    // 3. Add lazy-loading to <img> tags (only if loading attribute is missing)
    $buffer = preg_replace_callback('/<img\s+[^>]*>/i', function ($match) {
        $imgTag = $match[0];
        if (stripos($imgTag, 'loading=') === false) {
            return preg_replace('/<img/i', '<img loading="lazy"', $imgTag);
        }
        return $imgTag;
    }, $buffer);

    // 4. Safe WebP enhancement – only if WebP file exists
    $buffer = preg_replace_callback('/<img\s[^>]*src="([^"]+\.(jpg|jpeg|png))"[^>]*>/i', function ($matches) {
        $originalTag = $matches[0];
        $src = $matches[1];
        $webp = preg_replace('/\.(jpg|jpeg|png)$/i', '.webp', $src);
        $webpPath = $_SERVER['DOCUMENT_ROOT'] . $webp;

        if (file_exists($webpPath)) {
            return "<picture>
                <source srcset=\"$webp\" type=\"image/webp\">
                $originalTag
            </picture>";
        }
        return $originalTag; // Leave original if WebP not available
    }, $buffer);

    return $buffer;
});

// 5. Set safe, long cache headers (non-invasive, helps efficiency)
if (!headers_sent()) {
    header("Cache-Control: public, max-age=31536000, immutable");
    header("Vary: Accept-Encoding");
}
?>

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Safe Performance Middleware for NexSouk.com

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