ord() Returns the ASCII value of the first character of a string parse_str() Parses a query string into variables print() Outputs one or more strings printf() Outputs a formatted string quoted_printable_decode() Converts a quoted-printable string to an 8-bit string quoted_printable_encode...
Make a string's first character lowercase 使一个字符串的第一个字符小写 levenshtein() Calculate Levenshtein distance between two strings 计算两个字符串之间的编辑距离 localeconv() Get numeric formatting information ltrim() Strip whitespace (or other characters) from the beginning of a string 删除字符串...
php// Define a function named 'test' that extracts the first two characters of a stringfunctiontest($s1){// Check if the length of s1 is less than 2if(strlen($s1)<2){// If true, return s1 as isreturn$s1;}else{// If false, use substr to extract the first two characters of s1...
<0 - 如果 string1 小于 string2 >0 - 如果 string1 大于 string2 示例:*/echo"\n";echostrcmp("Hello", "hello");//-1 区分大小写比较(内部进行二进制级别比较)echostrcasecmp("Hello", "hello");//0 忽略大小写比较(内部进行二进制级别比较)/*19、strnatcmp(字符串1,字符串2) 使用一种“自然”...
Write a PHP script to find the first character that is different between two strings. String1: 'football' String2: 'footboll' Visual Presentation: Sample Solution: PHP Code: <?php// Define two strings to compare$str1='football';$str2='footboll';// Calculate the position of the first ...
strings until the end of the scriptmb_internal_encoding('UTF-8');// Tell PHP that we'll be outputting UTF-8 to the browsermb_http_output('UTF-8');// Our UTF-8 test string$string='Êl síla erin lû e-govaned vîn.';// Transform the string in some way with a multibyte ...
string (1) "e" int(3) 常量引用 “常量引用”意味着数组可以直接操作字符串和数组字面值。举两个例子: function randomHexString($length) { $str = ''; for ($i = 0; $i $str .= "0123456789abcdef"[mt_rand(0, 15)]; // direct dereference of string } } function randomBool() { return...
Returns a lowercase and trimmed string separated by the given delimiter. Delimiters are inserted before uppercase characters (with the exception of the first character of the string), and in place of spaces, dashes, and underscores. Alpha delimiters are not converted to lowercase.s('fooBar')->...
For instance, to find any character that’s a digit, an uppercase letter, or an “at” sign (@), use the following regular expression: [@[:digit:][:upper:]] However, you can’t use a character class as the endpoint of a range: preg_match("/[A-[:lower:]]/", "string");//...
; The value can be a string, a number, a PHP constant (e.g. E_ALL or M_PI), one ; of the INI constants (On, Off, True, False, Yes, No and None) or an expression ; (e.g. E_ALL & ~E_NOTICE), a quoted string ("bar"), or a reference to a ...