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  1. <?php
  2. $test = 'OLOLO';
  3.  
  4. $start = microtime(true);
  5. $x="test".$test;
  6. echo microtime(true)-$start."\n";
  7.  
  8. $start = microtime(true);
  9. $x="test $test"; 
  10. echo microtime(true)-$start."\n";
  11.  
  12. $start = microtime(true);
  13. $x="test";$x.=$test;
  14. echo microtime(true)-$start."\n";
  15.  
Success #stdin #stdout 0.01s 20520KB
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7.1525573730469E-6
3.0994415283203E-6
3.0994415283203E-6
https://ideone.com/YV487c
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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