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  1. <?php
  2. $s = '{somevalue:3}';
  3. $s = preg_replace_callback(
  4.        '/\{([^:]+):(\d+)\}/',
  5.        create_function('$m', 'return substr($m[1], 0, $m[2]);'), $s);
  6. print($s);
  7. ?>
Success #stdin #stdout 0.02s 13064KB
comments ()
stdin 
Standard input is empty
stdout 
som
https://ideone.com/QJLPVS
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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