What potential issues could arise when coding for different browsers like Internet Explorer and Firefox in PHP?

One potential issue when coding for different browsers like Internet Explorer and Firefox in PHP is that certain CSS styles or JavaScript functionalities may render differently or not work as intended across different browsers. To address this, you can use browser-specific CSS hacks or feature detection libraries like Modernizr to ensure consistent rendering and functionality across browsers. 

// Example of using browser-specific CSS hacks
echo '<style>';
echo '@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {';
echo ' /* IE specific styles */';
echo '}';
echo '</style>';

// Example of using Modernizr for feature detection
echo '<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.3/modernizr.js"></script>';

Keywords

Cross-browser compatibility Internet Explorer Firefox PHP functions Browser-specific bugs

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