如何使用PHP正则表达式从字符串中删除每个数字前面的新行字符? Example: $message = " My Number is \n 0\n 7\n 8\n 9\n Come Home\n " Becomes: $message = " My number is\n 0789\n Come Home\n " 这就是我拥有的,但它删除了所有内容 $message = trim(preg_replace('\d+\s+', '', $...
Preg_replace() takes a regex as its first parameter, what it should replace each match with as parameter two, and the string to work with as the third parameter. The second parameter is plain text, but can contain $n to insert the text matched by part n of your regex rule. Unless ...
{$split_words=explode( " " ,$words);foreach($split_wordsas$word) {$color= "#4285F4";$text=preg_replace("|($word)|Ui" , "$1" ,$text); }return$text; } 语法: <?php$string= "I like chocolates and I like apples";$words= "apple";echohighlighter_text($string,$words);?> 3....
在本例中,它应该更改为My name is Geor - 123123123 您可以简单地从字符串末尾的偏移量替换字符串的部分(-1 2-9表示数字,3表示空格、连字符和空格) So $string = 'My name is George 123123123'; $string = substr_replace($string, ' - ', -12, 3); echo $string; gives My name is Geor - 12...
In PHP every PCRE function starts withpreg_such aspreg_matchorpreg_replace. You can read the full function list inPHP’s documentation. 3. Basic Syntax To use regular expressions first you need to learn the syntax. This syntax consists in a series of letters, numbers, dots, hyphens and sp...
$regex = "/([a-zA-Z]+) (\d+)/"; $new_string = preg_replace($regex, "$2 of $1", "June 24"); // The string returned is either the same input string if the // regex does not match, or the transformed string. // This prints "24 of June" echo $new_string; Links For...
The regex above won't work when strlen($chars) == 0. I came up with this, admittedly pretty horrible-looking code, that is quite fast:<?phpfunction RemoveChars($string, $chars){ return isset($chars{0}) ? str_replace($chars{0}, "", strtr($string, $chars, str_pad($chars{0}, ...
0 - This is a modal window. No compatible source was found for this media. 2preg_match_all() The preg_match_all() function matches all occurrences of pattern in string. 3preg_replace() The preg_replace() function operates just like ereg_replace(), except that regular expressions can be...
自PHP 5.3.0起,POSIX 正则表达式扩展被废弃。在 POSIX 正则和 PCRE 正则之间有一些不同,本页列出了在转向PCRE 时最显著的需要知道的不同点。 PCRE 函数需要模式以分隔符闭合。 不像POSIX,PCRE 扩展没有专门用于大小写不敏感匹配的函数。取而代之的是,支持使用i(PCRE_CASELESS)模式修饰符完成同样的工作。 其他...
Examples PHPExamples ❮ PreviousNext ❯ PHP Syntax Write text to the output using PHPKeywords, classes, functions, and user-defined functions ARE NOT case-sensitiveVariable names ARE case-sensitive PHP Comments Syntax for single-line commentsSyntax for multi-line commentsUsing comments to leave ...