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  1. <?php
  2.  
  3. $x='xffx etgxrtgy hyh[pageid:2] t пепкеп пе
  4. [pageid:100|a]]
  5. exffxergtg rtg' ;
  6.  
  7. echo preg_replace_callback('/\[pageid:(\d+)(?:\|(\w+))?\]/',function($matches){
  8.     return "{found:{$matches[1]} {$matches[2]} }";
  9. },$x);
Success #stdin #stdout #stderr 0.02s 52472KB
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stdin
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Standard input is empty
stdout
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xffx etgxrtgy hyh{found:2  } t пепкеп пе
{found:100 a }]
exffxergtg rtg
stderr
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PHP Notice:  Undefined offset: 2 in /home/KMSqeQ/prog.php on line 8
https://ideone.com/zMiENJ
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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