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  1. <?php
  2. error_reporting(-1); 
  3. $sum = $x * 2; 
  4. for	($x = 1; $x < 10; $x++) {
  5. 	echo "$x * $x  = $sum\n";
  6. }
  7.  
Success #stdin #stdout #stderr 0.03s 25964KB
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stdin
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Standard input is empty
stdout
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1 * 1  = 0
2 * 2  = 0
3 * 3  = 0
4 * 4  = 0
5 * 5  = 0
6 * 6  = 0
7 * 7  = 0
8 * 8  = 0
9 * 9  = 0
stderr
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PHP Notice:  Undefined variable: x in /home/xfvi6J/prog.php on line 3
https://ideone.com/k02wSH
language:
PHP (php 7.3.5)
created:
1 day ago
visibility:
public

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