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<?php $tst = '!!!!'; $a = '@@@'; $template = '{{$tst}}test{{$a}}'; if (preg_match_all("/{{(.*?)}}/", $template, $m)) { foreach ($m[1] as $i => $varname) { $tst=11; echo strval($$varname).PHP_EOL.$m[0][$i].'===='.sprintf('$%s', $varname).PHP_EOL; //$template = str_replace($m[0][$i], ${$varname}, $template); } } $x = '###'.strval($a).PHP_EOL; echo $x; echo $template;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined variable $$tst in /in/vQBXS on line 10 {{$tst}}====$$tst Warning: Undefined variable $$a in /in/vQBXS on line 10 {{$a}}====$$a ###@@@ {{$tst}}test{{$a}}
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: $tst in /in/vQBXS on line 10 {{$tst}}====$$tst Notice: Undefined variable: $a in /in/vQBXS on line 10 {{$a}}====$$a ###@@@ {{$tst}}test{{$a}}
Output for 7.3.32 - 7.3.33
{{$tst}}====$$tst {{$a}}====$$a ###@@@ {{$tst}}test{{$a}}
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9, 5.0.2 - 5.0.3
Notice: Undefined variable: $tst in /in/vQBXS on line 10 {{$tst}}====$$tst Notice: Undefined variable: $a in /in/vQBXS on line 10 {{$a}}====$$a ###@@@ {{$tst}}test{{$a}}
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
Notice: Undefined variable: $tst in /in/vQBXS on line 10 Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/vQBXS on line 10 Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/vQBXS on line 10 PHP_EOL{{$tst}}====$$tstPHP_EOL Notice: Undefined variable: $a in /in/vQBXS on line 10 Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/vQBXS on line 10 Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/vQBXS on line 10 PHP_EOL{{$a}}====$$aPHP_EOL Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/vQBXS on line 14 ###@@@PHP_EOL{{$tst}}test{{$a}}

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