echo($my_str); ?> 输出结果 The non-alphanumeric characters removed gives the string as Thisissampleonly 函数“ preg_replace”用于从字符串中删除字母数字字符。正则表达式用于过滤字母数字字符。该字符串是预先定义的,并在其上调用了函数“ preg_replace”,并且重新格式化的字符串显示在控制台上。 示例 <?
// Replace non-alphanumeric characters with our delimiter $str = preg_replace('/[^\p{L}\p{Nd}]+/u', $options['delimiter'], $str); // Remove duplicate delimiters $str = preg_replace('/(' . preg_quote($options['delimiter'], '/') . '){2, }/', '$1', $str); // Truncat...
可以使用一些PCRE修饰符, 包括'e'(PREG_REPLACE_EVAL), 可以为这个函数指定. replacement 用于替换的字符串或字符串数组. 如果这个参数是一个字符串, 并且pattern 是一个数组, 那么所有的模式都使用这个字符串进行替换. 如果pattern和replacement 都是数组, 每个pattern使用replacement中对应的 元素进行替换. 如果re...
php// Define a string containing alphanumeric characters, including special characters like comma and period.$str1="$12,334.00A";// Use preg_replace function to remove all characters except digits (0-9), comma (,), and period (.).// The regular expression pattern "/[^0-9,.]/" match...
preg_replace(pattern,replacement,subject,[int limit]) 该函数将subject中符合pattern模式的部分替换成replacement,返回值类型和subject类型一样,如果有替换,则返回替换后的值,反之则返回原来的值。 参数可以是数组也可以是变量,有几种情况: <1>如果subject参数是数组类型。函数对每一个数组元素进行替换操作; ...
$text=ereg_replace("[[:alpha:]]+://[^<>[:space:]]+[[:alnum:]/]", "\\0",$text); ?> Tip preg_replace()函数使用了 Perl 兼容正则表达式语法,通常是比ereg_replace()更快的替代方案。 参见ereg(),eregi(),eregi_replace(),str_replace()和preg_match()。 User Contributed Notes23 notes...
$description = preg_replace("#^Sl.*#", "", $description); Breakdown: #beginning pattern delimiter. preg_xxx functions require you to wrap the pattern in a delimiter. You can use pretty much any non-alphanumeric character as the delimiter. Most people use / ~ or # ...
In this case you need to replace html entities gradually to preserve character good encoding. I wrote such closure for this job :<?php$decode_entities = function($string) {preg_match_all("/&#?\w+;/", $string, $entities, PREG_SET_ORDER);$entities = array_unique(array_column($entities...
如果没有一些特殊的替换需求(比如正则表达式),你应该使用该函数替换 ereg_replace() 和preg_replace()。 参数 如果search 和replace 为数组,那么 str_replace() 将对subject 做二者的映射替换。如果 replace 的值的个数少于 search 的个数,多余的替换将使用空字符串来进行。如果 search 是一个数组而 replace 是...
"replace": { "symfony Throughout the years PHP has added support for several extensions, libraries, and algorithms to encrypt and decrypt data. With several libraries and extensions with various levels of maintenance, several algorithms each potentially carrying pros and cons, some even inherently ...