Chapter 13 Page No. 405 Correct Me Pls

[raziqijr]

this is the the page 405 chapter 13

 

 

The foreach loop will access each item in the $very_bad array one at a time, assigning each item to $v. Within the loop, the stripos( ) function will check if the item is in the string provided to this function as $value. The

stripos( ) function performs a caseinsensitive search (so it would match bcc:, Bcc:, bCC:, etc.). The function returns a Boolean TRUE if the needle is found in the haystack (e.g., looking for occurrences of $v in $value). The conditional therefore says that if that function’s results do not equal FALSE (i.e., $v was not found in $value), return an empty string.

 

 

in above page i bold the text which should really have said (i.e $v was found in $value) am i right pls correct me if i am wrong.

[Larry]

No, it's correct as written. If the value was not found, in which case the stripos() function returns false, then return an empty string.

[raziqijr]

No, it's correct as written. If the value was not found, in which case the stripos() function returns false, then return an empty string.

 

 

look sir if stripos() functions result do not equal to false which mean ($v is found in $value) then return empty string. because if stripos() function result is false then it means ($v is not found in $value ) . i am confused pls give me a simple example

[HartleySan]

raziqijr, I don't think anyone understood your response, but to test for false, do the following:

 

if (stripos($value, $v) === false) {

 return '';

}

 

See the following link for details and more examples:

http://php.net/manual/en/function.stripos.php

[raziqijr]

raziqijr, I don't think anyone understood your response, but to test for false, do the following:

 

if (stripos($value, $v) === false) {

return '';

}

 

See the following link for details and more examples:

http://php.net/manua...ion.stripos.php

 

 

raziqijr, I don't think anyone understood your response, but to test for false, do the following:

 

if (stripos($value, $v) === false) {

return '';

}

 

See the following link for details and more examples:

http://php.net/manua...ion.stripos.php

 

 

thanks for your assistant , your right i understood your code but could you pls explain this for me

 

 

foreach ($very_bad as $v) {

 

if (stripos($value, $v) !== false)

 

return "";

}

[HartleySan]

!== is the opposite of ===. So if stripos($value, $v) returns anything but false (in other words, the string $v is found in the larger string $value), then the if statement evaluates to true and an empty string is returned.

 

Basically, this code is something that Larry wrote in order to avoid really bad strings in messages input by the user.

If any of the strings in the $very_bad array are found in the $value string (which is what the user typed), then an empty string is returned (because the user, either intentionally or unintentionally, typed something that could screw up the system).

[raziqijr]

!== is the opposite of ===. So if stripos($value, $v) returns anything but false (in other words, the string $v is found in the larger string $value), then the if statement evaluates to true and an empty string is returned.

 

Basically, this code is something that Larry wrote in order to avoid really bad strings in messages input by the user.

If any of the strings in the $very_bad array are found in the $value string (which is what the user typed), then an empty string is returned (because the user, either intentionally or unintentionally, typed something that could screw up the system).

 

ok now read it carefully

 

The foreach loop will access each item in the $very_bad array one at a time, assigning each item to $v. Within the loop, the stripos( ) function will check if the item is in the string provided to this function as $value. The

stripos( ) function performs a caseinsensitive search (so it would match bcc:, Bcc:, bCC:, etc.). The function returns a Boolean TRUE if the needle is found in the haystack (e.g., looking for occurrences of $v in $value). The conditional therefore says that if that function’s results do not equal FALSE (i.e., $v was not found in $value), return an empty string.

 

 

the bold red text above should really have said (i.e , $v was found in $value) not (i.e., $v was not found in $value)

 

what do u say?

[HartleySan]

Yes, that's exactly what I said in my post.

Does Larry's book say "$v was not found in $value"?

If so, that's an error and should be noted, you're right.

[raziqijr]

Yes, that's exactly what I said in my post.

Does Larry's book say "$v was not found in $value"?

If so, that's an error and should be noted, you're right.

 

yes its written in the book "$v was not found in $value" after all this is what i was talking about

[HartleySan]

Well, then that's incorrect.

Hopefully Larry will acknowledge that.

You may want to check the errata page for the book, as it might have already been acknowledged.

[raziqijr]

Well, then that's incorrect.

Hopefully Larry will acknowledge that.

You may want to check the errata page for the book, as it might have already been acknowledged.

 

ok thanks for your time

 

i'll check