> -----Original Message----- > From: Jim Lucas [mailto:lists@xxxxxxxxx] > Sent: Thursday, February 20, 2014 2:10 PM > To: Daevid Vincent; php-general@xxxxxxxxxxxxx > Subject: Re: Anyone have a tool/script to convert <? to <?php (but not > <?=) > > On 02/20/2014 02:05 PM, Jim Lucas wrote: > > On 02/20/2014 11:34 AM, Daevid Vincent wrote: > >> I've started writing the tool (which I will post when finished for others > to > >> use). > >> > >> However, I have a few questions about preg_replace(): > >> > >> How do I search for '$' literal? I thought it was just backslash escape > it > >> but that isn't matching (as indicated by the semi-colon in the output) > >> > > also, the thing to watch out for when trying to match a $ in your regex, if > you use double quotes, you need to double escape the $. If you use single > quotes, you only need 1 backslash. So... > > "/\\\$/" or '/\$/' would be the same > > >> php > echo preg_replace("/<\?=(\$.+?);?\s*\?/", '<?= '.trim("$1").' ?>', > >> 'Username: <?= $username; ?>')."\n"; > >> Username: <?= $username; ?> > >> > >> For fun I tried without the \$ and just $ but same thing. > >> > >> php > echo preg_replace("/<\?=($.+?);?\s*\?/", '<?= '.trim("$1").' ?>', > >> 'Username: <?= $username; ?>')."\n"; > >> Username: <?= $username; ?> > >> > >> Taking off the $ check all together I get the match, but then how can I > >> apply trim() to the match? The documentation seems to imply this should > work > >> no? http://php.net/preg_replace > >> > >> php > echo preg_replace("/<\?=(.+?);?\s*\?/", '<?= '.trim("$1").' ?', > >> 'Username: <?= $username; ?>')."\n"; > >> Username: <?= $username ?> > >> > >> For sanity I tried a few other things and it doesn't appear that the > chosen > >> function is processing the match variable $1? > >> > >> php > echo preg_replace("/<\?=(.+?);?\s*\?/", '<?= '.trim('$1').' ?', > >> 'Username: <?= $username; ?>')."\n"; > >> Username: <?= $username ?> > >> > >> php > echo preg_replace("/<\?=(.+?);?\s*\?/", '<?= '.md5('$1').' ?', > >> 'Username: <?= $username; ?>')."\n"; > >> Username: <?= 06d3730efc83058f497d3d44f2f364e3 ?> > >> > >> php > echo preg_replace("/<\?=(.+?);?\s*\?/", '<?= '.md5('$1').' ?', > >> 'Username: <?= $foo; ?>')."\n"; > >> Username: <?= 06d3730efc83058f497d3d44f2f364e3 ?> > >> > >> echo preg_replace("/<\?=(.+?);?\s*\?/", '<?= '.md5("$1").' ?', 'Username: > >> <?= $foo; ?>')."\n"; > >> Username: <?= 06d3730efc83058f497d3d44f2f364e3 ?> > >> > >> Notice how the MD5 didn't change, indicating that it's MD5'ing the > literal > >> string '$1' and verified by this > >> > >> php > echo md5('$1')."\n"; > >> 06d3730efc83058f497d3d44f2f364e3 > >> > >> *sigh* > >> > >> Ultimately I was able to craft a regex that I think will work in this > instance > >> > >> php > echo preg_replace("/<\?=\s*(.+?);?\s*\?/", "<?= $1 ?", 'Username: > >> <?= $username; ?>')."\n"; > >> Username: <?= $username ?> > >> > >> But I'd like to know the answers to the two questions above for future > >> reference > >> > >> > > > > > > Try this. It works for me. If the examples don't cover all your test > cases, > > please include them when you respond. > > > > [jlucas@jim ~]$ cat junk.php > > <?php > > > > $lines[] = 'Username: <?= $username; ?>'; > > $lines[] = 'Username: <?= $username; ?>'; > > $lines[] = 'Username: <?=$username; ?>'; > > $lines[] = 'Username: <?= $username;?>'; > > $lines[] = 'Username: <?=$username;?>'; > > > > $lines[] = 'Username: <?= $username ?>'; > > $lines[] = 'Username: <?= $username ?>'; > > $lines[] = 'Username: <?=$username ?>'; > > $lines[] = 'Username: <?= $username?>'; > > $lines[] = 'Username: <?=$username?>'; > > > > > > foreach ( $lines AS $line ) { > > echo preg_replace( > > '/<\?=\s*(\$[\w\d_]+);?\s*\?>/', > > '<?= '.trim('$1').' ?>', > > $line)."\n"; > > } > > > > > > > > [jlucas@jim ~]$ php -f junk.php > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Username: <?= $username ?> > > Thanks for the help Jim. I modified it a bit to handle more valid variable cases... $line = preg_replace('/<\?=\s*(\$[\w\d_\'\"\[\]\$]+);?\s*\?>/', '<?= $1 ?>', $line); The trim() is still not working right. You can change it to MD5() and see that the value doesn't change. While not needed in this particular case/regex, I'm curious why or more importantly how to process the matched part? -------------------------- 8< ---------------------- <? if ($foo_bar['test']) ?> bar = <?=$foo;?> bar = <?= $foo; ?> bar = <?=$foo?> bar = <?= $foo ?> <?= $foo_bar['test'] ?> <?=$foo_bar['test'];?> <?= $foo_bar["test"] ?> <?=$foo_bar["test"];?> <?= $foo_bar[0] ?> <?=$foo[$bar];?> <?php define('DEFINED_CONSTANT','SOME DEFINITION HERE'); ?> <?= DEFINED_CONSTANT ?> <?= UNDEFINED_CONSTANT ?> <? if($foo_bar['test']) ?> <?php $foo_bar['test']='bar'; ?> Username: <?= $foo_bar['username']; ?> Password: <?= $foo_bar['password'] ?> <?=$foo_bar['test']?> <?echo 'i told you so';?> -------------------------- >8 ---------------------- Results in : <? if ($foo_bar['test']) ?> bar = <?= $foo ?> bar = <?= $foo ?> bar = <?= $foo ?> bar = <?= $foo ?> <?= $foo_bar['test'] ?> <?= $foo_bar['test'] ?> <?= $foo_bar["test"] ?> <?= $foo_bar["test"] ?> <?= $foo_bar[0] ?> <?= $foo[$bar] ?> <?php define('DEFINED_CONSTANT','SOME DEFINITION HERE'); ?> <?= DEFINED_CONSTANT ?> <?= UNDEFINED_CONSTANT ?> <? if($foo_bar['test']) ?> <?php $foo_bar['test']='bar'; ?> Username: <?= $foo_bar['username'] ?> Password: <?= $foo_bar['password'] ?> <?= $foo_bar['test'] ?> <?echo 'i told you so';?> -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
