The string to extract the substring from. 从该string 中提取子字符串。 start If start is non-negative, the returned string will start at the start'th position in str, counting from zero. For instance, in the string 'abcdef', the character at position 0 is 'a', the character at positio...
substring(str, position [,length]) -- 从str的position开始,取length个字符 replace(str ,search_str ,replace_str) -- 在str中用replace_str替换search_str instr(string ,substring) -- 返回substring首次在string中出现的位置 concat(string [,...]) -- 连接字串 charset(str) -- 返回字串字符集 lcase...
- The string to extract the substring from. - 从该 string 中提取子字符串。 ### start - If start is non-negative, the returned string will start at the start'th position in str, counting from zero. For instance, in the string 'abcdef', the character at position 0 is 'a', the ch...
substr_count — Count the number of substring occurrences substr_replace — Replace text within a portion of a string substr — Return part of a string trim — Strip whitespace (or other characters) from the beginning and end of a string ucfirst — Make a string’s first character uppercase...
if (strlen($substring) == 5) { echo “字符串位数为5”; } else { echo “字符串位数不为5”; } “` 5. 使用mb_strlen()函数: 如果字符串包含多字节字符(例如中文),则可以使用mb_strlen()函数获取字符串的长度。mb_strlen()函数是多字节安全的,可以正确计算多字节字符的长度。例如: ...
echo $substring1 . $substring2; “` 5. 使用第三方库或扩展来处理中文字符的随机生成。例如,可以使用Faker库来生成随机中文字符串。首先需要安装Faker库,然后使用以下代码生成随机中文字符串: “`php require_once ‘vendor/autoload.php’; $faker = Faker\Factory::create(); ...
substr_count() Counts the number of times a substring occurs in a string substr_replace() Replaces a part of a string with another string trim() Removes whitespace or other characters from both sides of a string ucfirst() Converts the first character of a string to uppercase ucwords() Co...
To find substring of a string in PHP, we can use substr() function. Call substr() function, and pass the original given string, starting index, and substring
strtolower()") makes a string lowercase ucfirst()") makes the first character uppercase strpos()") finds the firsts occurrence of a substring in the string explode()") to split a string into an array implode()") to join array elements in a string ...
Write a PHP program to create a new string from a given string without the first and last character if the first or last characters are 'a' otherwise return the original given string. Sample Solution: PHP Code : <?php// Define a function named 'test' that removes the character 'a' fro...