smarty not working on new server PHP Version 5.2.6

Warning: preg_match() [function.preg-match]: Compilation failed: repeated subpattern is too long at offset 18454 in /Smarty_Compiler.class.php on line 454

Fatal error: Smarty error: [in login.tp开发者_运维知识库l line 1]: syntax error: unrecognized tag: php (Smarty_Compiler.class.php, line 455)

this message coming.. it was working perfect on dev server but on live server its not working.

Dev php version was 5.2.14 new server has PHP Version 5.2.6

is this the problem?

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What smarty version are you using?

This thread seems to imply it has to do with a combination of Smarty versions and php version: http://www.smarty.net/forums/viewtopic.php?t=14563

For most users the sollution seems to be to downgrade Smarty from 2.6.21 to 2.6.20

It's kind of an old thread though, so check if it applies, but it seems akin to your problem.

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Which version you are using ?

Use the latest version of smarty it might solve your problem.