Join Stack Overflow to learn, share knowledge, and build your career. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The string is correctly shown by PHP using print. I would like to obtain just the first 50 chars of this string, i. Is there any nice solution to this? All my strings are UTF-8, so I could of course program a substr-function myself, by checking the first bit of every byte etc. But this should surely have been done before, right?

Sorry to bother you guys, thanks for help. Its behavior is same to substrexcept it doesn't leave the last character to be broken. How are we doing? Please help us improve Stack Overflow. Take our short survey. Learn more. Ask Question. Asked 8 years, 4 months ago. Active 2 years, 3 months ago.

Viewed 20k times. Improve this question. And it does. Please add your comment as an answer, I'll accept it.

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Add a comment. Active Oldest Votes. Improve this answer. Abid Hussain Abid Hussain 7, 2 2 gold badges 30 30 silver badges 49 49 bronze badges. Though everything works, I like Example 3 most of all: it's better to use a single function. However, declare manual says: "The encoding declare value is ignored in PHP 5. As usual, the answer appears to have been here. Slavik Meltser Slavik Meltser 6, 36 36 silver badges 36 36 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook.

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I followed my dreams and got demoted to software developer. Podcast How to think in React. Featured on Meta.Performs a multi-byte safe substr operation based on number of characters. Position is counted from the beginning of string. First character's position is 0. Second character position is 1, and so on.

php multibyte substr

If start is non-negative, the returned string will start at the start 'th position in stringcounting from zero. For instance, in the string ' abcdef ', the character at position 0 is ' a ', the character at position 2 is ' c ', and so forth. If start is negative, the returned string will start at the start 'th character from the end of string. Maximum number of characters to use from string. If omitted or NULL is passed, extract all characters to the end of the string.

Der encoding Parameter legt das Zeichenencoding fest. Submit a Pull Request Report a Bug. Parameter-Liste string The string to extract the substring from. Changelog Version Beschreibung 8. One way to work around it is to first split your text into an array of letters using some smart preprocessing, and only then iterate over the array.

Each level of the recursion requires time linear in the length of the string, and there is logarithmic number of levels, so the total runtime is O N log Nwhich is still more than theoretically optimal O Nbut sadly this is the best idea I've got.

You can replace the digits by the same in japanese, chinese or whatever language to make a test, it works perfect. I'm trying to capitalize only the first character of the string and tried some of the examples above but they didn't work.Returns the portion of string specified by the offset and length parameters.

If offset is non-negative, the returned string will start at the offset 'th position in stringcounting from zero. For instance, in the string ' abcdef ', the character at position 0 is ' a ', the character at position 2 is ' c ', and so forth.

substr_replace

If offset is negative, the returned string will start at the offset 'th character from the end of string. If string is less than offset characters long, false will be returned. Example 1 Using a negative offset. If length is given and is positive, the string returned will contain at most length characters beginning from offset depending on the length of string.

If length is given and is negative, then that many characters will be omitted from the end of string after the start position has been calculated when a offset is negative. If offset denotes the position of this truncation or beyond, false will be returned.

If length is given and is 0false or nullan empty string will be returned. If length is omitted, the substring starting from offset until the end of the string will be returned. Returns the extracted part of string ; or false on failure, or an empty string. Example 3 Basic substr usage. Example 4 substr casting behaviour.

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Returns false on error. Submit a Pull Request Report a Bug. Parameters string The input string. Return Values Returns the extracted part of string ; or false on failure, or an empty string. Changelog Version Description 8. This returns the portion of str specified by the start and length parameters.

It can performs multi-byte safe on number of characters.Multibyte character encoding schemes and their related issues are fairly complicated, and are beyond the scope of this documentation. Please refer to the following URLs and other resources for further information regarding these topics.

Unicode materials. Submit a Pull Request Report a Bug. Multibyte String Functions References Multibyte character encoding schemes and their related issues are fairly complicated, and are beyond the scope of this documentation. Problems arise if you are getting a value "from outside" somewhere database, POST request and the encoding of the needle and the haystack is not the same. That typically means the source code is not saved in the same encoding as you are receiving "from outside". Therefore the binary representations don't match and nothing happens.

php multibyte substr

Note that some of the multi-byte functions run in O n time, rather than constant time as is the case for their single-byte equivalents. This includes any functionality requiring access at a specific index, since random access is not possible in a string whose number of bytes will not necessarily match the number of characters. Unlike other approaches that I've seen to this problem, I wanted to emulate the full functionality of trim - in particular, the ability to customise the character list.

It's not enough to ensure that all the strings involved use the same encoding: obviously they have to, but it's not enough. It has to be the right sort of encoding. UTF-8 is one of the safe ones, because it was designed to be unambiguous about where each encoded character begins and ends in the string of bytes that makes up the encoded text.

Some encodings are not safe: the last bytes of one character in a text followed by the first bytes of the next character may together make a valid character. It only knows about the string of bytes. It's not one of the safe ones. It is represented by the byte string [78 26 6c 74 3b 79].

Note that the text has three characters, but the string has six bytes.

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One more reason to use UTF-8 if you can, I guess. The regular expression modifier u does not mean ungreedy, rather it means the pattern is in UTF-8 encoding. Instead the U modifier should be used to get ungreedy behavior. I have not otherwise tested his code. At least it works well enough for Japanese and English.Join Stack Overflow to learn, share knowledge, and build your career. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I need to get the last character of a string.

Say I have "testers" as input string and I want the result to be "s".

php multibyte substr

Or by direct string access :. Note that this doesn't work for multibyte strings. From PHP 7. Also, I added this to xenonite's performance code with these results:. As of PHP 7.

So, if you keep up with the times, you can access the last character in the string like this:. I can't leave comments, but in regard to FastTrack's answer, also remember that the line ending may be only single character.

I would suggest. I have restored my original code and changed the wording to make it more clear. I don't think the person who asked the question needed this, but for me, I was having trouble getting that last character from a string from a text file so I'm sure others will come across similar problems.

A string in different languages including C sharp and PHP is also considered an array of characters. Use substr with a negative number for the 2nd argument. How are we doing? Please help us improve Stack Overflow. Take our short survey. Learn more. How to get the last char of a string in PHP? Ask Question.

Asked 10 years, 9 months ago. Active 4 months ago. Viewed k times. Improve this question. Add a comment. Active Oldest Votes.

Improve this answer. Rich Adams Rich Adams You only need multibyte string functions if the string is evaluated as binary string.If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. LOG IN. New User? Sign Up For Free! Forgot password? Get your certification today!

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Copyright by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3. Specifies where to start in the string A positive number - Start at a specified position in the string A negative number - Start at a specified position from the end of the string 0 - Start at the first character in string. Specifies the length of the returned string. Default is to the end of the string. PHP 7. PHP 5. Other versions get the string from start.An array of string s can be provided, in which case the replacements will occur on each string in turn.

In this case, the replaceoffset and length parameters may be provided either as scalar values to be applied to each input string in turn, or as array s, in which case the corresponding array element will be used for each input string. If offset is non-negative, the replacing will begin at the offset 'th offset into string. If offset is negative, the replacing will begin at the offset 'th character from the end of string.

If given and is positive, it represents the length of the portion of string which is to be replaced. If it is negative, it represents the number of characters from the end of string at which to stop replacing. If it is not given, then it will default to strlen string ; i. Of course, if length is zero then this function will have the effect of inserting replace into string at the given offset offset.

The result string is returned. If string is an array then array is returned. Version Description 8. Submit a Pull Request Report a Bug. Parameters string The input string.

Return Values The result string is returned.

Multibyte String

Changelog Version Description 8. Notes Note : This function is binary-safe. It's worth noting that when start and length are both negative -and- the length is less than or equal to start, the length will have the effect of being set as 0. I've just taken a look at the post by ntoniazzi and I have a very small correction to make.

I hope this helps someone. I wrote a function that you can use for example in combination with a search script to cut off the articles that are too long. I recently ran across a situation where I need to strip a heavily nested html list such that only the top level was preserved. I started with a regular expression solution, but found that I kept matching the wrong closing ul with an outer opening ul.

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This will truncate a longer string to a smaller string of specified length while replacing the middle portion with a separator exactly in the middle. Maybe someone needs it.