regex match all not PDF files [duplicate]

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1

This question already has an answer here:

• 
  Regex pattern that does not match certain extensions?
  
  5 answers
  
  


• 
  Regular expression for excluding file types .exe and .js
  
  3 answers
  
  

preg_match('/.(?!pdf)$/', $file)

I want to match all files except pdf files

path/file.jpg # match

path/file.png # match

path/file.pdf # not match

php regex

share|improve this question

edited Jan 3 at 11:15

splash58

21.9k31225

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

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Jan 3 at 12:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  if the file has a name like path/pdf_file.png
  
  – executable
  Jan 3 at 10:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  match all files except pdf files
  
  – clarkk
  Jan 3 at 10:47
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  .(?!pdf$).+$
  
  – splash58
  Jan 3 at 11:05
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @splash58 Please avoid posting answers as comments; it makes it harder to find, and impossible to edit, vote on, etc
  
  – IMSoP
  Jan 3 at 11:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You should not use all the recommended complicated regular expressions below. Use $(?<!.pdf) instead.
  
  – revo
  Jan 3 at 12:08
  

  
  
  
  

add a comment | 

1

This question already has an answer here:

• 
  Regex pattern that does not match certain extensions?
  
  5 answers
  
  


• 
  Regular expression for excluding file types .exe and .js
  
  3 answers
  
  

preg_match('/.(?!pdf)$/', $file)

I want to match all files except pdf files

path/file.jpg # match

path/file.png # match

path/file.pdf # not match

php regex

share|improve this question

edited Jan 3 at 11:15

splash58

21.9k31225

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

marked as duplicate by revo regex
Users with the  regex badge can single-handedly close regex questions as duplicates and reopen them as needed.

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Jan 3 at 12:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  if the file has a name like path/pdf_file.png
  
  – executable
  Jan 3 at 10:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  match all files except pdf files
  
  – clarkk
  Jan 3 at 10:47
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  .(?!pdf$).+$
  
  – splash58
  Jan 3 at 11:05
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @splash58 Please avoid posting answers as comments; it makes it harder to find, and impossible to edit, vote on, etc
  
  – IMSoP
  Jan 3 at 11:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You should not use all the recommended complicated regular expressions below. Use $(?<!.pdf) instead.
  
  – revo
  Jan 3 at 12:08
  

  
  
  
  

add a comment | 

1

1

1

0

This question already has an answer here:

• 
  Regex pattern that does not match certain extensions?
  
  5 answers
  
  


• 
  Regular expression for excluding file types .exe and .js
  
  3 answers
  
  

preg_match('/.(?!pdf)$/', $file)

I want to match all files except pdf files

path/file.jpg # match

path/file.png # match

path/file.pdf # not match

php regex

share|improve this question

edited Jan 3 at 11:15

splash58

21.9k31225

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

This question already has an answer here:

• 
  Regex pattern that does not match certain extensions?
  
  5 answers
  
  


• 
  Regular expression for excluding file types .exe and .js
  
  3 answers
  
  

preg_match('/.(?!pdf)$/', $file)

I want to match all files except pdf files

path/file.jpg # match

path/file.png # match

path/file.pdf # not match

This question already has an answer here:

• 
  Regex pattern that does not match certain extensions?
  
  5 answers
  
  


• 
  Regular expression for excluding file types .exe and .js
  
  3 answers
  
  

php regex

php regex

share|improve this question

edited Jan 3 at 11:15

splash58

21.9k31225

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

share|improve this question

edited Jan 3 at 11:15

splash58

21.9k31225

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

share|improve this question

share|improve this question

edited Jan 3 at 11:15

splash58

21.9k31225

edited Jan 3 at 11:15

splash58

21.9k31225

edited Jan 3 at 11:15

splash58

21.9k31225

21.9k31225

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

asked Jan 3 at 10:45

clarkkclarkk

8,01248145239

8,01248145239

marked as duplicate by revo regex
Users with the  regex badge can single-handedly close regex questions as duplicates and reopen them as needed.

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Jan 3 at 12:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

marked as duplicate by revo regex
Users with the  regex badge can single-handedly close regex questions as duplicates and reopen them as needed.

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Jan 3 at 12:06

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  if the file has a name like path/pdf_file.png
  
  – executable
  Jan 3 at 10:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  match all files except pdf files
  
  – clarkk
  Jan 3 at 10:47
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  .(?!pdf$).+$
  
  – splash58
  Jan 3 at 11:05
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @splash58 Please avoid posting answers as comments; it makes it harder to find, and impossible to edit, vote on, etc
  
  – IMSoP
  Jan 3 at 11:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You should not use all the recommended complicated regular expressions below. Use $(?<!.pdf) instead.
  
  – revo
  Jan 3 at 12:08
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  if the file has a name like path/pdf_file.png
  
  – executable
  Jan 3 at 10:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  match all files except pdf files
  
  – clarkk
  Jan 3 at 10:47
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  .(?!pdf$).+$
  
  – splash58
  Jan 3 at 11:05
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @splash58 Please avoid posting answers as comments; it makes it harder to find, and impossible to edit, vote on, etc
  
  – IMSoP
  Jan 3 at 11:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  You should not use all the recommended complicated regular expressions below. Use $(?<!.pdf) instead.
  
  – revo
  Jan 3 at 12:08
  

  
  
  
  

if the file has a name like path/pdf_file.png

– executable
Jan 3 at 10:46

if the file has a name like path/pdf_file.png

– executable
Jan 3 at 10:46

match all files except pdf files

– clarkk
Jan 3 at 10:47

match all files except pdf files

– clarkk
Jan 3 at 10:47

.(?!pdf$).+$

– splash58
Jan 3 at 11:05

.(?!pdf$).+$

– splash58
Jan 3 at 11:05

@splash58 Please avoid posting answers as comments; it makes it harder to find, and impossible to edit, vote on, etc

– IMSoP
Jan 3 at 11:06

@splash58 Please avoid posting answers as comments; it makes it harder to find, and impossible to edit, vote on, etc

– IMSoP
Jan 3 at 11:06

You should not use all the recommended complicated regular expressions below. Use $(?<!.pdf) instead.

– revo
Jan 3 at 12:08

You should not use all the recommended complicated regular expressions below. Use $(?<!.pdf) instead.

– revo
Jan 3 at 12:08

add a comment | 

3 Answers
3

active

oldest

votes

1

Instead of using regex, you can take the extension of your file and check if it's a pdf.

$ext = pathinfo($file, PATHINFO_EXTENSION);

if($ext != 'pdf'){

    echo "I'm not a pdf";

}

If you prefer using regex

<?php

$file = array("path/file.jpg", "path/file.png", "path/file.pdf");

foreach ($file as &$value) {

    preg_match('/^(.(?!.*.pdf$))*$/', $value, $matches);

    if(!empty($matches)){

        echo " $value is not a pdf";

    }

}

https://regex101.com/r/7C7YsR/1

share|improve this answer

edited Jan 3 at 11:13

answered Jan 3 at 10:49

executableexecutable

1,9832924

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I prefer regex..
  
  – clarkk
  Jan 3 at 10:53
  

  
  
  
  

add a comment | 

1

If you want to use a regex, this one will work:

^(?!.*.pdf).*$

It simply uses a negative lookahead to assert that the filename doesn't end in .pdf and then .* to match everything in the filename.

Demo on regex101

In PHP:

$filenames = array('path/file.jpg','path/file.png','path/file.pdf');

foreach ($filenames as $filename) {

    if (preg_match('/^(?!.*.pdf).*$/', $filename)) echo ""$filename" is not a PDF file.n";

}

Output:

"path/file.jpg" is not a PDF file. 

"path/file.png" is not a PDF file.

Demo on 3v4l.org

share|improve this answer

answered Jan 3 at 11:09

NickNick

39.4k132443

add a comment | 

0

Asserting that something is not present in a regex is often fiddly, because a regex works by looking through the input for things to match.

The approach you've used is a "zero-width negative look-ahead assertion" - it matches anywhere in the string that isn't followed by pdf, but doesn't "use up" any input. So your regex doesn't work because the rest of it still needs to match, and that is /.$/, meaning ". at end of string".

The simplest approach is to look for strings that do end .pdf, e.g. if ( ! preg_match('/.pdf$/', $file) ) { ... }.

share|improve this answer

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

add a comment | 

3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

active

oldest

votes

active

oldest

votes

1

Instead of using regex, you can take the extension of your file and check if it's a pdf.

$ext = pathinfo($file, PATHINFO_EXTENSION);

if($ext != 'pdf'){

    echo "I'm not a pdf";

}

If you prefer using regex

<?php

$file = array("path/file.jpg", "path/file.png", "path/file.pdf");

foreach ($file as &$value) {

    preg_match('/^(.(?!.*.pdf$))*$/', $value, $matches);

    if(!empty($matches)){

        echo " $value is not a pdf";

    }

}

https://regex101.com/r/7C7YsR/1

share|improve this answer

edited Jan 3 at 11:13

answered Jan 3 at 10:49

executableexecutable

1,9832924

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I prefer regex..
  
  – clarkk
  Jan 3 at 10:53
  

  
  
  
  

add a comment | 

1

Instead of using regex, you can take the extension of your file and check if it's a pdf.

$ext = pathinfo($file, PATHINFO_EXTENSION);

if($ext != 'pdf'){

    echo "I'm not a pdf";

}

If you prefer using regex

<?php

$file = array("path/file.jpg", "path/file.png", "path/file.pdf");

foreach ($file as &$value) {

    preg_match('/^(.(?!.*.pdf$))*$/', $value, $matches);

    if(!empty($matches)){

        echo " $value is not a pdf";

    }

}

https://regex101.com/r/7C7YsR/1

share|improve this answer

edited Jan 3 at 11:13

answered Jan 3 at 10:49

executableexecutable

1,9832924

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I prefer regex..
  
  – clarkk
  Jan 3 at 10:53
  

  
  
  
  

add a comment | 

1

1

1

Instead of using regex, you can take the extension of your file and check if it's a pdf.

$ext = pathinfo($file, PATHINFO_EXTENSION);

if($ext != 'pdf'){

    echo "I'm not a pdf";

}

If you prefer using regex

<?php

$file = array("path/file.jpg", "path/file.png", "path/file.pdf");

foreach ($file as &$value) {

    preg_match('/^(.(?!.*.pdf$))*$/', $value, $matches);

    if(!empty($matches)){

        echo " $value is not a pdf";

    }

}

https://regex101.com/r/7C7YsR/1

share|improve this answer

edited Jan 3 at 11:13

answered Jan 3 at 10:49

executableexecutable

1,9832924

Instead of using regex, you can take the extension of your file and check if it's a pdf.

$ext = pathinfo($file, PATHINFO_EXTENSION);

if($ext != 'pdf'){

    echo "I'm not a pdf";

}

If you prefer using regex

<?php

$file = array("path/file.jpg", "path/file.png", "path/file.pdf");

foreach ($file as &$value) {

    preg_match('/^(.(?!.*.pdf$))*$/', $value, $matches);

    if(!empty($matches)){

        echo " $value is not a pdf";

    }

}

https://regex101.com/r/7C7YsR/1

share|improve this answer

edited Jan 3 at 11:13

answered Jan 3 at 10:49

executableexecutable

1,9832924

share|improve this answer

share|improve this answer

edited Jan 3 at 11:13

edited Jan 3 at 11:13

edited Jan 3 at 11:13

answered Jan 3 at 10:49

executableexecutable

1,9832924

answered Jan 3 at 10:49

executableexecutable

1,9832924

answered Jan 3 at 10:49

executableexecutable

1,9832924

1,9832924

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I prefer regex..
  
  – clarkk
  Jan 3 at 10:53
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I prefer regex..
  
  – clarkk
  Jan 3 at 10:53
  

  
  
  
  

I prefer regex..

– clarkk
Jan 3 at 10:53

I prefer regex..

– clarkk
Jan 3 at 10:53

add a comment | 

1

If you want to use a regex, this one will work:

^(?!.*.pdf).*$

It simply uses a negative lookahead to assert that the filename doesn't end in .pdf and then .* to match everything in the filename.

Demo on regex101

In PHP:

$filenames = array('path/file.jpg','path/file.png','path/file.pdf');

foreach ($filenames as $filename) {

    if (preg_match('/^(?!.*.pdf).*$/', $filename)) echo ""$filename" is not a PDF file.n";

}

Output:

"path/file.jpg" is not a PDF file. 

"path/file.png" is not a PDF file.

Demo on 3v4l.org

share|improve this answer

answered Jan 3 at 11:09

NickNick

39.4k132443

add a comment | 

1

If you want to use a regex, this one will work:

^(?!.*.pdf).*$

It simply uses a negative lookahead to assert that the filename doesn't end in .pdf and then .* to match everything in the filename.

Demo on regex101

In PHP:

$filenames = array('path/file.jpg','path/file.png','path/file.pdf');

foreach ($filenames as $filename) {

    if (preg_match('/^(?!.*.pdf).*$/', $filename)) echo ""$filename" is not a PDF file.n";

}

Output:

"path/file.jpg" is not a PDF file. 

"path/file.png" is not a PDF file.

Demo on 3v4l.org

share|improve this answer

answered Jan 3 at 11:09

NickNick

39.4k132443

add a comment | 

1

1

1

If you want to use a regex, this one will work:

^(?!.*.pdf).*$

It simply uses a negative lookahead to assert that the filename doesn't end in .pdf and then .* to match everything in the filename.

Demo on regex101

In PHP:

$filenames = array('path/file.jpg','path/file.png','path/file.pdf');

foreach ($filenames as $filename) {

    if (preg_match('/^(?!.*.pdf).*$/', $filename)) echo ""$filename" is not a PDF file.n";

}

Output:

"path/file.jpg" is not a PDF file. 

"path/file.png" is not a PDF file.

Demo on 3v4l.org

share|improve this answer

answered Jan 3 at 11:09

NickNick

39.4k132443

If you want to use a regex, this one will work:

^(?!.*.pdf).*$

It simply uses a negative lookahead to assert that the filename doesn't end in .pdf and then .* to match everything in the filename.

Demo on regex101

In PHP:

$filenames = array('path/file.jpg','path/file.png','path/file.pdf');

foreach ($filenames as $filename) {

    if (preg_match('/^(?!.*.pdf).*$/', $filename)) echo ""$filename" is not a PDF file.n";

}

Output:

"path/file.jpg" is not a PDF file. 

"path/file.png" is not a PDF file.

Demo on 3v4l.org

share|improve this answer

answered Jan 3 at 11:09

NickNick

39.4k132443

share|improve this answer

share|improve this answer

answered Jan 3 at 11:09

NickNick

39.4k132443

answered Jan 3 at 11:09

NickNick

39.4k132443

answered Jan 3 at 11:09

NickNick

39.4k132443

39.4k132443

add a comment | 

add a comment | 

0

Asserting that something is not present in a regex is often fiddly, because a regex works by looking through the input for things to match.

The approach you've used is a "zero-width negative look-ahead assertion" - it matches anywhere in the string that isn't followed by pdf, but doesn't "use up" any input. So your regex doesn't work because the rest of it still needs to match, and that is /.$/, meaning ". at end of string".

The simplest approach is to look for strings that do end .pdf, e.g. if ( ! preg_match('/.pdf$/', $file) ) { ... }.

share|improve this answer

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

add a comment | 

0

Asserting that something is not present in a regex is often fiddly, because a regex works by looking through the input for things to match.

The approach you've used is a "zero-width negative look-ahead assertion" - it matches anywhere in the string that isn't followed by pdf, but doesn't "use up" any input. So your regex doesn't work because the rest of it still needs to match, and that is /.$/, meaning ". at end of string".

The simplest approach is to look for strings that do end .pdf, e.g. if ( ! preg_match('/.pdf$/', $file) ) { ... }.

share|improve this answer

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

add a comment | 

0

0

0

Asserting that something is not present in a regex is often fiddly, because a regex works by looking through the input for things to match.

The approach you've used is a "zero-width negative look-ahead assertion" - it matches anywhere in the string that isn't followed by pdf, but doesn't "use up" any input. So your regex doesn't work because the rest of it still needs to match, and that is /.$/, meaning ". at end of string".

The simplest approach is to look for strings that do end .pdf, e.g. if ( ! preg_match('/.pdf$/', $file) ) { ... }.

share|improve this answer

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

Asserting that something is not present in a regex is often fiddly, because a regex works by looking through the input for things to match.

The approach you've used is a "zero-width negative look-ahead assertion" - it matches anywhere in the string that isn't followed by pdf, but doesn't "use up" any input. So your regex doesn't work because the rest of it still needs to match, and that is /.$/, meaning ". at end of string".

The simplest approach is to look for strings that do end .pdf, e.g. if ( ! preg_match('/.pdf$/', $file) ) { ... }.

share|improve this answer

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

share|improve this answer

share|improve this answer

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

answered Jan 3 at 11:11

IMSoPIMSoP

48.3k65895

48.3k65895

add a comment | 

add a comment | 

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