Php признак конца строки

Php признак конца строки

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Просьба на ошибки внимание не обращать.

» width=»100%» style=»BORDER-RIGHT: #719bd9 1px solid; BORDER-LEFT: #719bd9 1px solid; BORDER-BOTTOM: #719bd9 1px solid» cellpadding=»6″ cellspacing=»0″ border=»0″>

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можно практически все, но просто мы это еще не знаем.
главный враг програмиста это копипастинг
За хорошее сообщение не забываем нажимать ссылочку «Полезное сообщение»!

» width=»100%» style=»BORDER-RIGHT: #719bd9 1px solid; BORDER-LEFT: #719bd9 1px solid; BORDER-BOTTOM: #719bd9 1px solid» cellpadding=»6″ cellspacing=»0″ border=»0″>

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The Power To Serve.

» width=»100%» style=»BORDER-RIGHT: #719bd9 1px solid; BORDER-LEFT: #719bd9 1px solid; BORDER-BOTTOM: #719bd9 1px solid» cellpadding=»6″ cellspacing=»0″ border=»0″>

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The Power To Serve.

Источник

Функции для работы со строками

Для получения информации о более сложной обработке строк обратитесь к функциями Perl-совместимых регулярных выражений. Для работы с многобайтовыми кодировками посмотрите на функции по работе с многобайтовыми кодировками.

Содержание

User Contributed Notes 23 notes

In response to hackajar yahoo com,

No string-to-array function exists because it is not needed. If you reference a string with an offset like you do with an array, the character at that offset will be return. This is documented in section III.11’s «Strings» article under the «String access and modification by character» heading.

I use these little doo-dads quite a bit. I just thought I’d share them and maybe save someone a little time. No biggy. 🙂

Just a note in regards to bloopletech a few posts down:

The word «and» should not be used when converting numbers to text. «And» (at least in US English) should only be used to indicate the decimal place.

Example:
1,796,706 => one million, seven hundred ninety-six thousand, seven hundred six.
594,359.34 => five hundred ninety four thousand, three hundred fifty nine and thirty four hundredths

//
// string strtrmvistl( string str, [int maxlen = 64],
// [bool right_justify = false],
// [string delimter = «
\n»])
//
// splits a long string into two chunks (a start and an end chunk)
// of a given maximum length and seperates them by a given delimeter.
// a second chunk can be right-justified within maxlen.
// may be used to ‘spread’ a string over two lines.
//

I really searched for a function that would do this as I’ve seen it in other languages but I couldn’t find it here. This is particularily useful when combined with substr() to take the first part of a string up to a certain point.

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?>

Example: Give me everything up to the fourth occurance of ‘/’.

The functions below:

Are correct, but flawed. You’d need to use the === operator instead:

/*
* example
* accept only alphanum caracteres from the GET/POST parameters ‘a’
*/

Here’s a simpler «simplest» way to toggle through a set of 1..n colors for web backgrounds:

I was looking for a function to find the common substring in 2 different strings. I tried both the mb_string_intersect and string_intersect functions listed here but didn’t work for me. I found the algorithm at http://en.wikibooks.org/wiki/Algorithm_implementation/Strings/Longest_common_substring#PHP so here I post you the function

Here’s an easier way to find nth.

If you want a function to return all text in a string up to the Nth occurrence of a substring, try the below function.

(Pommef provided another sample function for this purpose below, but I believe it is incorrect.)

/*
// prints:
S: d24jkdslgjldk2424jgklsjg24jskgldjk24
1: d
2: d24jkdslgjldk
3: d24jkdslgjldk24
4: d24jkdslgjldk2424jgklsjg
5: d24jkdslgjldk2424jgklsjg24jskgldjk
6: d24jkdslgjldk2424jgklsjg24jskgldjk24
7: d24jkdslgjldk2424jgklsjg24jskgldjk24
*/

?>

Note that this function can be combined with wordwrap() to accomplish a routine but fairly difficult web design goal, namely, limiting inline HTML text to a certain number of lines. wordwrap() can break your string using
, and then you can use this function to only return text up to the N’th
.

You will still have to make a conservative guess of the max number of characters per line with wordwrap(), but you can be more precise than if you were simply truncating a multiple-line string with substr().

= ‘Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Pellentesque id massa. Duis sollicitudin ipsum vel diam. Aliquam pulvinar sagittis felis. Nullam hendrerit semper elit. Donec convallis mollis risus. Cras blandit mollis turpis. Vivamus facilisis, sapien at tincidunt accumsan, arcu dolor suscipit sem, tristique convallis ante ante id diam. Curabitur mollis, lacus vel gravida accumsan, enim quam condimentum est, vitae rutrum neque magna ac enim.’ ;

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Pellentesque id massa. Duis sollicitudin
ipsum vel diam. Aliquam pulvinar sagittis felis. Nullam hendrerit semper elit. Donec convallis
mollis risus. Cras blandit mollis turpis. Vivamus facilisis, sapien at tincidunt accumsan, arcu

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Pellentesque id massa. Duis sollicitudin
ipsum vel diam. Aliquam pulvinar sagittis felis. Nullam hendrerit semper elit. Donec convallis
mollis risus. Cras blandit mollis turpis. Vivamus facilisis, sapien at tincidunt accumsan, arcu
dolor suscipit sem, tristique convallis ante ante id diam. Curabitur mollis, lacus vel gravida

Источник

stristr

(PHP 4, PHP 5, PHP 7, PHP 8)

stristr — Регистронезависимый вариант функции strstr()

Описание

Возвращает всю строку haystack начиная с первого вхождения needle включительно.

Список параметров

Строка, в которой производится поиск

needle и haystack обрабатываются без учёта регистра.

Возвращаемые значения

Список изменений

Версия Описание
8.0.0 Передача целого числа ( int ) в needle больше не поддерживается.
7.3.0 Передача целого числа ( int ) в needle объявлена устаревшей.

Примеры

Пример #1 Пример использования stristr()

Пример #2 Проверка на вхождение строки

Пример #3 Использование не строки в поиске

Примечания

Замечание: Эта функция безопасна для обработки данных в двоичной форме.

Смотрите также

User Contributed Notes 8 notes

There was a change in PHP 4.2.3 that can cause a warning message
to be generated when using stristr(), even though no message was
generated in older versions of PHP.

Just been caught out by stristr trying to converting the needle from an Int to an ASCII value.

Got round this by casting the value to a string.

An example for the stristr() function:

I think there is a bug in php 5.3 in stristr with uppercase Ä containing other character

if you search only with täry it works, but as soon as the word is tärylä it does not. TÄRYL works fine

Beware the example given here:

if stristr($message,’viagra’)
or stristr($message,’cialis’)
)
<
die();
>

stristr does not search for words, it finds matching substrings. So, for example, the check for ‘cialis’ will trigger on ‘specialist’

Active item item in menu:

handy little bit of code I wrote to take arguments from the command line and parse them for use in my apps.

//now lets parse the array and return the parameter name and its setting
// since the input is being sent by the user via the command line
//we will use stristr since we don’t care about case sensitivity and
//will convert them as needed later.

//lets grap the parameter name first using a double reverse string
// to get the begining of the string in the array then reverse it again
// to set it back. we will also «trim» off the «=» sign

//now lets get what the parameter is set to.
// again «trimming» off the = sign

// now do something with our results.
// let’s just echo them out so we can see that everything is working

?>

when run from the CLI this script returns the following.

Array index is 0 and value is a.php
Parameter is and is set to

Array index is 1 and value is val1=one
Parameter is val1 and is set to one

Array index is 2 and value is val2=two
Parameter is val2 and is set to two

Array index is 3 and value is val3=three
Parameter is val3 and is set to three

Источник

substr

(PHP 4, PHP 5, PHP 7, PHP 8)

substr — Возвращает подстроку

Описание

Список параметров

Пример #1 Использование отрицательного параметра offset

Если length положительный, возвращаемая строка будет не длиннее length символов, начиная с параметра offset (в зависимости от длины string ).

Если параметр length опущен, то будет возвращена подстрока, начинающаяся с позиции, указанной параметром offset и длящейся до конца строки.

Пример #2 Использование отрицательного параметра length

Возвращаемые значения

Возвращает извлечённую часть параметра string ; или false в случае возникновения ошибки или пустую строку.

Список изменений

Примеры

Пример #3 Базовое использование substr()

Пример #4 substr() и приведение типов

class apple <
public function __toString () <
return «green» ;
>
>

Результат выполнения данного примера в PHP 7:

Результат выполнения данного примера в PHP 5:

Ошибки

Возвращает false в случае ошибки.

Смотрите также

User Contributed Notes 35 notes

For getting a substring of UTF-8 characters, I highly recommend mb_substr

may be by following functions will be easier to extract the needed sub parts from a string:

Coming to PHP from classic ASP I am used to the Left() and Right() functions built into ASP so I did a quick PHPversion. hope these help someone else making the switch

### SUB STRING BY WORD USING substr() and strpos() #####

### THIS SCRIPT WILL RETURN PART OF STRING WITHOUT WORD BREAK ###

If you want to have a string BETWEEN two strings, just use this function:

$string = «123456789» ;
$a = «12» ;
$b = «9» ;

I created some functions for entity-safe splitting+lengthcounting:

PS:I’m sorry my english is too poor. 🙁

Drop extensions of a file (even from a file location string)

= «c:/some dir/abc defg. hi.jklmn» ;

?>

output: c:/some dir/abc defg. hi

Hope it may help somebody like me.. (^_^)

Just a little function to cut a string by the wanted amount. Works in both directions.

Here we have gr8 function which simply convert ip address to a number using substr with negative offset.
You can need it if you want to compare some IP addresses converted to a numbers.
For example when using ip2country, or eliminating same range of ip addresses from your website 😀

$min = ip2no ( «10.11.1.0» );
$max = ip2no ( «111.11.1.0» );
$visitor = ip2no ( «105.1.20.200» );

I wanted to work out the fastest way to get the first few characters from a string, so I ran the following experiment to compare substr, direct string access and strstr:

(substr) 3.24
(direct access) 11.49
(strstr) 4.96

(With standard deviations 0.01, 0.02 and 0.04)

THEREFORE substr is the fastest of the three methods for getting the first few letters of a string.

I needed a function like lpad from oracle, or right from SQL
then I use this code :

I have developed a function with a similar outcome to jay’s

Checks if the last character is or isnt a space. (does it the normal way if it is)
It explodes the string into an array of seperate works, the effect is. it chops off anything after and including the last space.

Anyone coming from the Python world will be accustomed to making substrings by using a «slice index» on a string. The following function emulates basic Python string slice behavior. (A more elaborate version could be made to support array input as well as string, and the optional third «step» argument.)

The output from the examples:
c
cd
cdefg
abcd
abcd
efg

Prior to PHP 5.3, substr() tries to cast the second parameter to int and doesn’t throw any errors. Since PHP 5.3 a warning is thrown.

Using a 0 as the last parameter for substr().

Well this is a script I wrote, what it does is chop up long words with malicious meaning into several parts. This way, a chat in a table will not get stretched anymore.

?>

Using this is similar to simple substr.

Источник

rtrim

(PHP 4, PHP 5, PHP 7, PHP 8)

rtrim — Удаляет пробелы (или другие символы) из конца строки

Описание

Эта функция возвращает строку string с удалёнными из конца строки пробельными (или другими) символами.

Список параметров

Возвращаемые значения

Возвращает модифицированную строку.

Примеры

Пример #1 Пример использования rtrim()

Результат выполнения данного примера:

Смотрите также

User Contributed Notes 14 notes

I have an obsessive love for php’s array functions given how extremely easy they’ve made complex string handling for me in various situations. so, have another string-rtrim() variant:

?>

Astonishingly, something I didn’t expect, but: It completely compares to harmor’s rstrtrim below, execution time wise. o_o Whee!

True, the Perl chomp() will only trim newline characters. There is, however, the Perl chop() function which is pretty much identical to the PHP rtrim()

Here’s a quick way to recursively trim every element of an array, useful after the file() function :

On the recurring subject of string-stripping instead of character-stripping rtrim() implementations. the simplest (with a caveat) is probably the basename() function. It has a second parameter that functions as a right-trim using whole strings:

Since it also strips anything that looks like a directory, it’s not quite identical with hacking a string off the end:

But sometimes it gets the job done.

I needed a way to trim all white space and then a few chosen strings from the end of a string. So I wrote this class to reuse when stuff needs to be trimmed.

$pinfo = «Well. I’m really bored.

I’m sure there’s a better way to strip strings from the end of strings.

echo read_mode(«Lorem ipsum dolor sit amet, consectetur adipisicing elit. Proin nibh augue, suscipit a, scelerisque sed, lacinia in, mi. Cras vel lorem. Etiam pellentesque aliquet tellus. Phasellus pharetra nulla ac diam. Quisque semper justo at risus. Donec venenatis, turpis vel hendrerit interdum, dui ligula ultricies purus, sed posuere libero dui id orci.»);
/* Output:
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Proin nibh augue, suscipit a, scelerisque sed, lacinia in, mi. Cras vel lorem. Etiam pellentesque. */

Trim limit would be really helpfull. I made a little helper function to do a rtrim with a limited number of replaces:

The example above doesn’t include the case where there is no «.»
If there is not «.» at the example above the last word will be deleted.

Have fun with this code.

The simplest way to strip a newline form a text file is ltrim();

trim or explode or split («\n» or «\r\n») doesn’t work in all cases, so give ltrim(); a try instead.

The simplest way to strip a newline form a text file is ltrim();

trim or explode or split («\n» or «\r\n») doesn’t work in all cases, so give ltrim(); a try instead.

Источник

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