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  1. <?php
  2. // your code goes here
  3. $length=10;
  4. ?>
  5.  
  6. <script>
  7. 	function syncCheckbox(obj1, obj2){
  8. 		var checkboxA = document.getElementById(obj1);
  9. 		var checkboxB = document.getElementById(obj2);
  10. 		checkboxB.checked = checkboxA.checked
  11. 	}
  12. </script>
  13. <form>
  14. <?php
  15. 	$i=0;
  16. 	while($i++ < $length){
  17. 		echo <<<EOT
  18. 		<input type='checkbox' id="a{$i}" onclick="syncCheckbox('a{$i}','b{$i}')"></input>
  19. 		<input type='checkbox' id="b{$i}"></input>
  20. 		<br>
  21.  
  22. EOT;
  23. 	}
  24. ?>
  25. </form>
Success #stdin #stdout 0.01s 20520KB
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stdin 
Standard input is empty
stdout 
<script>
	function syncCheckbox(obj1, obj2){
		var checkboxA = document.getElementById(obj1);
		var checkboxB = document.getElementById(obj2);
		checkboxB.checked = checkboxA.checked
	}
</script>
<form>
		<input type='checkbox' id="a1" onclick="syncCheckbox('a1','b1')"></input>
		<input type='checkbox' id="b1"></input>
		<br>
		<input type='checkbox' id="a2" onclick="syncCheckbox('a2','b2')"></input>
		<input type='checkbox' id="b2"></input>
		<br>
		<input type='checkbox' id="a3" onclick="syncCheckbox('a3','b3')"></input>
		<input type='checkbox' id="b3"></input>
		<br>
		<input type='checkbox' id="a4" onclick="syncCheckbox('a4','b4')"></input>
		<input type='checkbox' id="b4"></input>
		<br>
		<input type='checkbox' id="a5" onclick="syncCheckbox('a5','b5')"></input>
		<input type='checkbox' id="b5"></input>
		<br>
		<input type='checkbox' id="a6" onclick="syncCheckbox('a6','b6')"></input>
		<input type='checkbox' id="b6"></input>
		<br>
		<input type='checkbox' id="a7" onclick="syncCheckbox('a7','b7')"></input>
		<input type='checkbox' id="b7"></input>
		<br>
		<input type='checkbox' id="a8" onclick="syncCheckbox('a8','b8')"></input>
		<input type='checkbox' id="b8"></input>
		<br>
		<input type='checkbox' id="a9" onclick="syncCheckbox('a9','b9')"></input>
		<input type='checkbox' id="b9"></input>
		<br>
		<input type='checkbox' id="a10" onclick="syncCheckbox('a10','b10')"></input>
		<input type='checkbox' id="b10"></input>
		<br>
</form>
https://ideone.com/5fskM8
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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