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function writeMyName()
  {
  echo "David Yang";
  }
 
writeMyName();
?>
 
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<body>
 
<?php
function writeMyName()
  {
  echo "David Yang";
  }
 
echo "Hello world!<br />";
echo "My name is ";
writeMyName();
echo ".<br />That's right, ";
writeMyName();
echo " is my name.";
?>
 
</body>
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Hello world!
My name is David Yang.
That's right, David Yang is my name.
 
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<body>
 
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function writeMyName($fname)
  {
  echo $fname . " Yang.<br />";
  }
 
echo "My name is ";
writeMyName("David");
 
echo "My name is ";
writeMyName("Mike");
 
echo "My name is ";
writeMyName("John");
?>
 
</body>
</html>
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My name is David Yang.
My name is Mike Yang.
My name is John Yang.
 


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