PHP string FAQ: How can I strip unwanted characters from a PHP string? (Also asked as, How can I delete unwanted characters from a PHP string?) Show
SolutionHere’s a quick PHP preg_replace example that takes a given input string, and strips all the characters from the string other than letters (the lowercase letters "a-z", and the uppercase letters "A-Z"): $res = preg_replace("/[^a-zA-Z]/", "", $string); If you put this line of code to work in a small PHP script, like this: <?php $string = "Th*()is 999 is <<>> a ~!@# sample st#$%ring."; $res = preg_replace("/[^a-zA-Z]/", "", $string); echo $res; ?> and then run that script, you’ll get the following output: Thisisasamplestring As you can see, all the other characters have been stripped from the input string, leaving only letters in the resulting string. Strip all characters but letters and numbers from a PHP stringNext, if we want to allow numbers as well as letters, we can modify our regular expression and
$res = preg_replace("/[^a-zA-Z0-9]/", "", $string); (I'll leave that output to you.) Strip all characters but letters, numbers, and whitespaceFinally, if you want to strip all characters from your string other than letters, numbers, and whitespace, this regular expression will do the trick: $res = preg_replace("/[^a-zA-Z0-9\s]/", "", $string); (Again, I leave that output as "an exercise for the reader.") Bonus: A complete PHP string-cleaning functionBefore I go, I thought it might help to share the PHP function I wrote recently that led to this blog post. For my purposes, I needed a PHP function to do the following things:
Given those character-stripping needs, here's the source code for PHP function named <?php // created by alvin alexander, alvinalexander.com // take a given string, // remove all chars except [a-zA-Z], // make the string lowercase, // limit the number of chars to 8. function cleanString($string) { // allow only letters $res = preg_replace("/[^a-zA-Z]/", "", $string); // trim what's left to 8 chars $res = substr($res, 0, 8); // make lowercase $res = strtolower($res); // return return $res; } // test the function echo cleanString("iajaf1237412~!@#$%^&*()-=+_][{};:/.,<>?AAMNBVCXZLKJHG'\""); ?> I'm still a relative PHP newbie, but I at least know that this code works, so I thought I'd share it here. Hopefully it can help someone else who needs to strip unwanted characters out of a PHP string.
PHP remove all characters before specific stringTags: string , php Answers: 1 | Viewed 137,389 times I need to remove all characters from any string before the occurrence of this inside the string:
Not sure how I can do this. xdazz answer at 2011-10-18 183 You can use strstr to do this.
* The answers/resolutions are collected from stackoverflow, are licensed under CC BY-SA 3.0 Some Code Answersstr_replace( $searchVal, $replaceVal, $subjectVal, $count ) Example to remove the Special Char str_ireplace( $searchVal, $replaceVal, $subjectVal, $count ) Example to remove the Special Char preg_replace( $pattern, $replacement, $subject, $limit, $count ) Example to remove the Special Char More Answers Related Php Remove All Characters Before Specific StringRemove Special Character in PHP | Delft Stack1 day ago $search_str: It contains such value which we want to search in the given string.$replace_str: It stores a value that you want to replace, or you can also leave it empty if you only want the removal of a special character.$main_str: It is the string we want to update.$count: It represents the number of characters we want to replace or remove. Show details › See also: String Date PHP remove all characters before certain string6 days ago Web Apr 21, 2015 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build … Show details › See also: String PHP remove all characters before specific string - PHPissue1 day ago Web Sep 24, 2022 · [FIXED] PHP remove all characters before specific string . September 24, 2022 php, string No comments Issue. I need to remove all characters from any … Show details › See also: Php String PHP: Remove Everything Before and Including a Character/String4 days ago Web This can be achieved using string manipulation functions in PHP. First we find the position of the desired character in the string using strpos(), substr(), ltrim, and trim() Show details › See also: String Function How to Remove Special Character from String in PHP6 days ago Web May 31, 2020 · We have given a string and we need to remove special characters from string str in PHP, for this, we have the following methods in PHP: Using str_replace() … › Estimated Reading Time: 2 mins Show details › See also: String php remove string before specific character Code Example1 week ago Web More “Kinda” Related PHP Answers View All PHP Answers » php replace space with underscore; php remove last character in string; php remove last char from string Show details › See also: Php String Use PHP to remove certain characters or words from a …1 week ago Web Dec 05, 2019 · The following wrapper function shows how we can use PHP to remove specific characters from a value or text. We simply pass the text or value to the … Show details › See also: Function How to remove portion of a string after a certain …1 week ago Web Feb 21, 2019 · The substr () and strpos () function is used to remove portion of string after certain character. strpos () function: This function is used to find the first occurrence … Show details › See also: String Function php remove string before specific character Code Example6 days ago Web $fullpath = 'folderName/file.ext'; $folder = substr($fullpath, 0, strpos($fullpath, '/')); echo $folder; // Output => folderName Show details › See also: Php String File Remove Specific, Special Characters From String In PHP2 days ago Web Jun 16, 2022 · Method 1: Remove Specific Character from String. We have one string if you want to remove specific characters from a string. So use the below function: The … Show details › See also: String Function How to remove special characters from a String in PHP1 day ago Web Dec 18, 2021 · Now to remove the special characters from the string, we have to use a regular expression that matches any non-alphanumeric character as shown below. [^a … Show details › See also: String Express PHP remove all characters before specific string5 days ago Web PHP remove all characters before specific string. होमपेज; php; php remove all characters before specific string "php remove all characters before specific string" … Show details › See also: Php String Please leave your answer here:How do you remove portion of a string before a certain character in PHP?The chop() function removes whitespaces or other predefined characters from the right end of a string.
How do I trim a string after a specific character in PHP?The substr() and strpos() function is used to remove portion of string after certain character. strpos() function: This function is used to find the first occurrence position of a string inside another string. Function returns an integer value of position of first occurrence of string.
What is str_ replace in PHP?The str_replace() function replaces some characters with some other characters in a string. This function works by the following rules: If the string to be searched is an array, it returns an array. If the string to be searched is an array, find and replace is performed with every array element.
How do I remove all characters from a string after a specific character?Using 'str.
If we want to remove that specific character, replace that character with an empty string. The str. replace() method will replace all occurrences of the specific character mentioned.
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