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Exercise:Replace the word "World" with the word "Dolly".
$oldtxt = "Hello World!";
$newtxt = @(11)(@(7), @(7), @(7));
$oldtxt = "Hello World!";
$newtxt = str_replace("World", "Dolly", $oldtxt);
$oldtxt = "Hello World!";
$newtxt = str_replace('World', 'Dolly', $oldtxt);
$oldtxt = "Hello World!";
$newtxt = str_replace("World", 'Dolly', $oldtxt);
$oldtxt = "Hello World!";
$newtxt = str_replace('World', "Dolly", $oldtxt);
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