str_replace, gives me the wrong result Only when numerals are in it [duplicate]

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-2

This question already has an answer here:

str_replace with array

4 answers

//post data
$post = $_POST['username'];

//str replace
$print = str_replace([1,2,3,4,5], ['4A','6B','7C','2D','6F'], $post);

//prints result
echo ""username":"" . $print . """;

str replace works fine when it's just alpha (example: TEST!@#test = 7160767124452671607671 which is just perfect, but as soon as digits come into play things get messy $print should output "username":"4A6B7C2D6F" if input 12345 the current output is "username":"2DA6B7C2D6F"

asked Nov 14 '18 at 4:11

Razu Razu

marked as duplicate by Tim Biegeleisen, Phil php
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Nov 14 '18 at 4:30

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.

2

Please show us clear input and the expected output with that input. I don't follow what you are trying to do here.

– Tim Biegeleisen
Nov 14 '18 at 4:13

2

1 becomes 4A then the 4 is replaced with 2D so you get the 2DA.

– user3783243
Nov 14 '18 at 4:21

1

Without your actual code, just about any answer to this may be wrong. Please provide real-world requirements and examples

– Phil
Nov 14 '18 at 4:24

2

Also, never roll your own JSON. Use echo json_encode(['username' => $print]); instead

– Phil
Nov 14 '18 at 4:26

1

So what exactly does "I have alpha in my actual code, as well as symbols" mean? Are you or are you not only trying to replace digits 1 through 5 with 4A, 6B, 7C, 2D, 6F?

– Phil
Nov 14 '18 at 4:32

|
show 7 more comments

-2

This question already has an answer here:

str_replace with array

4 answers

//post data
$post = $_POST['username'];

//str replace
$print = str_replace([1,2,3,4,5], ['4A','6B','7C','2D','6F'], $post);

//prints result
echo ""username":"" . $print . """;

asked Nov 14 '18 at 4:11

Razu Razu

marked as duplicate by Tim Biegeleisen, Phil php
Users with the php badge can single-handedly close php questions as duplicates and reopen them as needed.

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Nov 14 '18 at 4:30

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.

2

Please show us clear input and the expected output with that input. I don't follow what you are trying to do here.

– Tim Biegeleisen
Nov 14 '18 at 4:13

2

1 becomes 4A then the 4 is replaced with 2D so you get the 2DA.

– user3783243
Nov 14 '18 at 4:21

1

Without your actual code, just about any answer to this may be wrong. Please provide real-world requirements and examples

– Phil
Nov 14 '18 at 4:24

2

Also, never roll your own JSON. Use echo json_encode(['username' => $print]); instead

– Phil
Nov 14 '18 at 4:26

1

So what exactly does "I have alpha in my actual code, as well as symbols" mean? Are you or are you not only trying to replace digits 1 through 5 with 4A, 6B, 7C, 2D, 6F?

– Phil
Nov 14 '18 at 4:32

|
show 7 more comments

-2

This question already has an answer here:

str_replace with array

4 answers

//post data
$post = $_POST['username'];

//str replace
$print = str_replace([1,2,3,4,5], ['4A','6B','7C','2D','6F'], $post);

//prints result
echo ""username":"" . $print . """;

asked Nov 14 '18 at 4:11

Razu Razu

This question already has an answer here:

str_replace with array

4 answers

//post data
$post = $_POST['username'];

//str replace
$print = str_replace([1,2,3,4,5], ['4A','6B','7C','2D','6F'], $post);

//prints result
echo ""username":"" . $print . """;

This question already has an answer here:

str_replace with array

4 answers

php str-replace

asked Nov 14 '18 at 4:11

Razu Razu

asked Nov 14 '18 at 4:11

Razu Razu

asked Nov 14 '18 at 4:11

Razu Razu

asked Nov 14 '18 at 4:11

Razu Razu

asked Nov 14 '18 at 4:11

Razu Razu

marked as duplicate by Tim Biegeleisen, Phil php
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Nov 14 '18 at 4:30

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 Tim Biegeleisen, Phil php
Users with the php badge can single-handedly close php questions as duplicates and reopen them as needed.

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Nov 14 '18 at 4:30

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.

2

Please show us clear input and the expected output with that input. I don't follow what you are trying to do here.

– Tim Biegeleisen
Nov 14 '18 at 4:13

2

1 becomes 4A then the 4 is replaced with 2D so you get the 2DA.

– user3783243
Nov 14 '18 at 4:21

1

Without your actual code, just about any answer to this may be wrong. Please provide real-world requirements and examples

– Phil
Nov 14 '18 at 4:24

2

Also, never roll your own JSON. Use echo json_encode(['username' => $print]); instead

– Phil
Nov 14 '18 at 4:26

1

So what exactly does "I have alpha in my actual code, as well as symbols" mean? Are you or are you not only trying to replace digits 1 through 5 with 4A, 6B, 7C, 2D, 6F?

– Phil
Nov 14 '18 at 4:32

|
show 7 more comments

2

Please show us clear input and the expected output with that input. I don't follow what you are trying to do here.

– Tim Biegeleisen
Nov 14 '18 at 4:13

2

1 becomes 4A then the 4 is replaced with 2D so you get the 2DA.

– user3783243
Nov 14 '18 at 4:21

1

Without your actual code, just about any answer to this may be wrong. Please provide real-world requirements and examples

– Phil
Nov 14 '18 at 4:24

2

Also, never roll your own JSON. Use echo json_encode(['username' => $print]); instead

– Phil
Nov 14 '18 at 4:26

1

So what exactly does "I have alpha in my actual code, as well as symbols" mean? Are you or are you not only trying to replace digits 1 through 5 with 4A, 6B, 7C, 2D, 6F?

– Phil
Nov 14 '18 at 4:32

Please show us clear input and the expected output with that input. I don't follow what you are trying to do here.

– Tim Biegeleisen
Nov 14 '18 at 4:13

1 becomes 4A then the 4 is replaced with 2D so you get the 2DA.

– user3783243
Nov 14 '18 at 4:21

Without your actual code, just about any answer to this may be wrong. Please provide real-world requirements and examples

– Phil
Nov 14 '18 at 4:24

Also, never roll your own JSON. Use echo json_encode(['username' => $print]); instead

– Phil
Nov 14 '18 at 4:26

So what exactly does "I have alpha in my actual code, as well as symbols" mean? Are you or are you not only trying to replace digits 1 through 5 with 4A, 6B, 7C, 2D, 6F?

– Phil
Nov 14 '18 at 4:32

|
show 7 more comments

2 Answers
2

active

oldest

votes

str_replace starts every replacement scan from the beginning and will replace parts of your prior replacements. Instead use strtr which won't.

The longest keys will be tried first. Once a substring has been replaced, its new value will not be searched again.

E.g.:

echo strtr("12345", [
 1 => '4A',
 2 => '6B',
 3 => '7C',
 4 => '2D',
 5 => '6F'
]);

will give you:

4A6B7C2D6F

edited Nov 14 '18 at 4:30

answered Nov 14 '18 at 4:24

Paul

17.9k104059

add a comment |

Welcome to StackOverflow!

I found some information regarding your issue in the official PHP.net documentation.

Caution

Replacement order gotcha

Because str_replace() replaces left to right, it might replace a
previously inserted value when doing multiple replacements. See also
the examples in this document.

In your case it's first replacing the 1 with 4A and then replacing the 4 in 4A with 2D resulting in 2DA and after that it seems to be replacing everything correctly.

Happy coding!

EDIT: Using strtr as illustrated in Paul's answer will give you the result you desire.

edited Nov 14 '18 at 4:31

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

This is a nice explanation of the problem but doesn't exactly provide a solution.

– Phil
Nov 14 '18 at 4:28

Yeah, I didn't find a good way to solve it. I thought about using strtr like you did in your answer, but couldn't recall that an array could be used for replacements.

– Linus Juhlin
Nov 14 '18 at 4:30

That is not my answer

– Phil
Nov 14 '18 at 4:31

Woops! Seems like I misread the name. My bad. I've updated my answer pointing to Paul's answer for the solution.

– Linus Juhlin
Nov 14 '18 at 4:32

add a comment |

2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

str_replace starts every replacement scan from the beginning and will replace parts of your prior replacements. Instead use strtr which won't.

The longest keys will be tried first. Once a substring has been replaced, its new value will not be searched again.

E.g.:

echo strtr("12345", [
 1 => '4A',
 2 => '6B',
 3 => '7C',
 4 => '2D',
 5 => '6F'
]);

will give you:

4A6B7C2D6F

edited Nov 14 '18 at 4:30

answered Nov 14 '18 at 4:24

Paul

17.9k104059

add a comment |

str_replace starts every replacement scan from the beginning and will replace parts of your prior replacements. Instead use strtr which won't.

The longest keys will be tried first. Once a substring has been replaced, its new value will not be searched again.

E.g.:

echo strtr("12345", [
 1 => '4A',
 2 => '6B',
 3 => '7C',
 4 => '2D',
 5 => '6F'
]);

will give you:

4A6B7C2D6F

edited Nov 14 '18 at 4:30

answered Nov 14 '18 at 4:24

Paul

17.9k104059

add a comment |

str_replace starts every replacement scan from the beginning and will replace parts of your prior replacements. Instead use strtr which won't.

The longest keys will be tried first. Once a substring has been replaced, its new value will not be searched again.

E.g.:

echo strtr("12345", [
 1 => '4A',
 2 => '6B',
 3 => '7C',
 4 => '2D',
 5 => '6F'
]);

will give you:

4A6B7C2D6F

edited Nov 14 '18 at 4:30

answered Nov 14 '18 at 4:24

Paul

17.9k104059

str_replace starts every replacement scan from the beginning and will replace parts of your prior replacements. Instead use strtr which won't.

The longest keys will be tried first. Once a substring has been replaced, its new value will not be searched again.

E.g.:

echo strtr("12345", [
 1 => '4A',
 2 => '6B',
 3 => '7C',
 4 => '2D',
 5 => '6F'
]);

will give you:

4A6B7C2D6F

edited Nov 14 '18 at 4:30

answered Nov 14 '18 at 4:24

Paul

17.9k104059

edited Nov 14 '18 at 4:30

answered Nov 14 '18 at 4:24

Paul

17.9k104059

answered Nov 14 '18 at 4:24

Paul

17.9k104059

answered Nov 14 '18 at 4:24

Paul

17.9k104059

add a comment |

Welcome to StackOverflow!

I found some information regarding your issue in the official PHP.net documentation.

Caution

Replacement order gotcha

Because str_replace() replaces left to right, it might replace a
previously inserted value when doing multiple replacements. See also
the examples in this document.

In your case it's first replacing the 1 with 4A and then replacing the 4 in 4A with 2D resulting in 2DA and after that it seems to be replacing everything correctly.

Happy coding!

EDIT: Using strtr as illustrated in Paul's answer will give you the result you desire.

edited Nov 14 '18 at 4:31

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

This is a nice explanation of the problem but doesn't exactly provide a solution.

– Phil
Nov 14 '18 at 4:28

Yeah, I didn't find a good way to solve it. I thought about using strtr like you did in your answer, but couldn't recall that an array could be used for replacements.

– Linus Juhlin
Nov 14 '18 at 4:30

That is not my answer

– Phil
Nov 14 '18 at 4:31

Woops! Seems like I misread the name. My bad. I've updated my answer pointing to Paul's answer for the solution.

– Linus Juhlin
Nov 14 '18 at 4:32

add a comment |

Welcome to StackOverflow!

I found some information regarding your issue in the official PHP.net documentation.

Caution

Replacement order gotcha

Because str_replace() replaces left to right, it might replace a
previously inserted value when doing multiple replacements. See also
the examples in this document.

In your case it's first replacing the 1 with 4A and then replacing the 4 in 4A with 2D resulting in 2DA and after that it seems to be replacing everything correctly.

Happy coding!

EDIT: Using strtr as illustrated in Paul's answer will give you the result you desire.

edited Nov 14 '18 at 4:31

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

This is a nice explanation of the problem but doesn't exactly provide a solution.

– Phil
Nov 14 '18 at 4:28

Yeah, I didn't find a good way to solve it. I thought about using strtr like you did in your answer, but couldn't recall that an array could be used for replacements.

– Linus Juhlin
Nov 14 '18 at 4:30

That is not my answer

– Phil
Nov 14 '18 at 4:31

Woops! Seems like I misread the name. My bad. I've updated my answer pointing to Paul's answer for the solution.

– Linus Juhlin
Nov 14 '18 at 4:32

add a comment |

Welcome to StackOverflow!

I found some information regarding your issue in the official PHP.net documentation.

Caution

Replacement order gotcha

Because str_replace() replaces left to right, it might replace a
previously inserted value when doing multiple replacements. See also
the examples in this document.

In your case it's first replacing the 1 with 4A and then replacing the 4 in 4A with 2D resulting in 2DA and after that it seems to be replacing everything correctly.

Happy coding!

EDIT: Using strtr as illustrated in Paul's answer will give you the result you desire.

edited Nov 14 '18 at 4:31

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

Welcome to StackOverflow!

I found some information regarding your issue in the official PHP.net documentation.

Caution

Replacement order gotcha

Because str_replace() replaces left to right, it might replace a
previously inserted value when doing multiple replacements. See also
the examples in this document.

In your case it's first replacing the 1 with 4A and then replacing the 4 in 4A with 2D resulting in 2DA and after that it seems to be replacing everything correctly.

Happy coding!

EDIT: Using strtr as illustrated in Paul's answer will give you the result you desire.

edited Nov 14 '18 at 4:31

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

edited Nov 14 '18 at 4:31

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

answered Nov 14 '18 at 4:26

Linus Juhlin

351414

This is a nice explanation of the problem but doesn't exactly provide a solution.

– Phil
Nov 14 '18 at 4:28

Yeah, I didn't find a good way to solve it. I thought about using strtr like you did in your answer, but couldn't recall that an array could be used for replacements.

– Linus Juhlin
Nov 14 '18 at 4:30

That is not my answer

– Phil
Nov 14 '18 at 4:31

Woops! Seems like I misread the name. My bad. I've updated my answer pointing to Paul's answer for the solution.

– Linus Juhlin
Nov 14 '18 at 4:32

add a comment |

This is a nice explanation of the problem but doesn't exactly provide a solution.

– Phil
Nov 14 '18 at 4:28

Yeah, I didn't find a good way to solve it. I thought about using strtr like you did in your answer, but couldn't recall that an array could be used for replacements.

– Linus Juhlin
Nov 14 '18 at 4:30

That is not my answer

– Phil
Nov 14 '18 at 4:31

Woops! Seems like I misread the name. My bad. I've updated my answer pointing to Paul's answer for the solution.

– Linus Juhlin
Nov 14 '18 at 4:32

This is a nice explanation of the problem but doesn't exactly provide a solution.

– Phil
Nov 14 '18 at 4:28

Yeah, I didn't find a good way to solve it. I thought about using strtr like you did in your answer, but couldn't recall that an array could be used for replacements.

– Linus Juhlin
Nov 14 '18 at 4:30

That is not my answer

– Phil
Nov 14 '18 at 4:31

Woops! Seems like I misread the name. My bad. I've updated my answer pointing to Paul's answer for the solution.

– Linus Juhlin
Nov 14 '18 at 4:32

add a comment |

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