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run code in 150+ php & hhvm versions
Bugs & Features
<? for ($sayac = 1; $sayac <= 7 ; $sayac++ ) { echo ("<font size= "&sayac&" >"); echo ("<b><p>MErhaba Dünya</b></p>"); echo ("</font>"); } ?>
based on NKYeY
Output for 5.4.34 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Use of undefined constant sayac - assumed 'sayac' in /in/SPlCv on line 4 <b><p>MErhaba Dünya</b></p></font> Notice: Use of undefined constant sayac - assumed 'sayac' in /in/SPlCv on line 4 <b><p>MErhaba Dünya</b></p></font> Notice: Use of undefined constant sayac - assumed 'sayac' in /in/SPlCv on line 4 <b><p>MErhaba Dünya</b></p></font> Notice: Use of undefined constant sayac - assumed 'sayac' in /in/SPlCv on line 4 <b><p>MErhaba Dünya</b></p></font> Notice: Use of undefined constant sayac - assumed 'sayac' in /in/SPlCv on line 4 <b><p>MErhaba Dünya</b></p></font> Notice: Use of undefined constant sayac - assumed 'sayac' in /in/SPlCv on line 4 <b><p>MErhaba Dünya</b></p></font> Notice: Use of undefined constant sayac - assumed 'sayac' in /in/SPlCv on line 4 <b><p>MErhaba Dünya</b></p></font>
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 5.4.32
<? for ($sayac = 1; $sayac <= 7 ; $sayac++ ) { echo ("<font size= "&sayac&" >"); echo ("<b><p>MErhaba Dünya</b></p>"); echo ("</font>"); } ?>