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  1. <?
  2. $text=<<< HEREDOC
  3. [img=4_bh77jks0a.jpg]Картинка[/img]
  4. [img=4_bh77jks0b.jpg][/img]
  5. HEREDOC;
  6. $RE1="/\[img=([^\]]*?)\](.*?)\[\/img\]/is";
  7. $RE2="/\[img=([^\]]*?)\](.+?)?\[\/img\](?=.*(<img src=\")(\" )(\/>))(?(2)(?=.*(alt=\")(\" )))|#.*?$/is";
  8. echo preg_replace_callback($RE1, "clb", $text)."\n\n";
  9. echo preg_replace($RE2, "$3$1$4$6$2$7$5", $text."#<img src=\"\" />alt=\"\" ");
  10. function clb($arr){
  11.     return "<img src=\"$arr[1]\" ".($arr[2]?"alt=\"$arr[2]\" ":"")."/>";
  12. }
  13. ?>
Success #stdin #stdout 0.02s 13064KB
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<img src="4_bh77jks0a.jpg" alt="Картинка" />
<img src="4_bh77jks0b.jpg" />

<img src="4_bh77jks0a.jpg" alt="Картинка" />
<img src="4_bh77jks0b.jpg" />
https://ideone.com/5kbz1K
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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