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<?php // Array find-and-replace $dirty = 'colour & flavour'; $search = ['colour', 'flavour']; $replace = ['color', 'flavor']; echo str_replace($search, $replace, $dirty); // color & flavor // Case-insensitive version echo str_ireplace('HELLO', 'Hi', 'Hello World'); // Hi World // Regex replace — strip HTML tags leaving text $html = '<p>Hello <strong>World</strong></p>'; $plain = preg_replace('/<[^>]+>/', '', $html); echo $plain; // Hello World // preg_match with capture groups $date = '2024-07-15'; if (preg_match('/(\d{4})-(\d{2})-(\d{2})/', $date, $m)) { echo "Year: {$m[1]}, Month: {$m[2]}, Day: {$m[3]}"; } // preg_split $parts = preg_split('/[\s,]+/', 'one, two, three'); print_r($parts); // ['one', 'two', 'three']
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