Common PHP string processing functions common functions for PHP string operations common functions ** determine string length * intstrlen (stringstr) * compare two strings * 1. the strcmp function performs binary security comparison on the two strings, and Case Sensitive * intstrcmp (stringstr1, stringstr2) * 2. compares two strings in case insensitive * common intstrcas PHP string processing functions
PHP string operations common functions
/*
* Determine the string length
* Int strlen (string str)
* Compare two strings
* 1. the strcmp function performs binary security comparison on two strings and is case sensitive.
* Int strcmp (string str1, string str2)
* 2. compare two strings in case-insensitive mode
* Int strcasecmp (string str1, string str2)
* 3. obtain the same part of the Two Strings.
* Int strspn (string str1, string str2)
* 4. find different parts of two strings
* Int strcspn (string str1, string str2)
* Process string case sensitivity
* 1. convert all strings to lowercase letters.
* String strtolower (string str)
* 2. convert all strings into uppercase letters.
* String strtoupper (string str)
* 3. capital the first character of the string
* String ucfirst (string str)
* 4. convert each word in the string into uppercase letters.
* String ucword (string str)
* String and HTML conversion
* 1. convert a linefeed to an HTML termination mark.
* String bl2br (string str)
* 2. Convert Special characters into wieldHTML equivalent form
* String htmlentities (string str [, int quote_style [, int charset])
* 3. use special HTML characters for other purposes
* String htmlspecialchars (string str [, int quote_style [, string charset])
* 4. convert text to HTML equivalent form
* Array get_html_translaction_table (int table [, int quote_style])
* 5. create a custom conversion list
* String strtr (string str, array replacements)
* 6. Convert HTML to plain text
* String strip_tags (string str [, string allowable_tags])
* Replacement functions of regular expression functions
* 1. the strtok function parses strings based on the predefined string list.
* String strtok (string str, string tonens)
* 2. analyze strings based on predefined delimiters
* Array explode (string separator, string str [, int limit])
* 3. convert an array to a string.
* String implode (string delimiter, array)
* 4. parse complex strings
* Int strpos (string str, string substr [, int offset])
* 5. find the last occurrence of the string
* Int strrpos (string str, char substr [, offset])
* 6. replace all instances of strings with another string
* Mixed str_replace (string occurrence, mixed replacement, mixed str [, int count])
* 7. obtain a part of the string strstr and return the rest of the pre-defined string that begins to appear for the first time.
* String strstr (string str, string occurrence)
* 8. return part of the string based on the predefined offset.
* String substr (string str, int start [, ing length])
* 9. determine the occurrence frequency of the string.
* Int substr_count (string str, string substring)
* 10. replace a part of a string with another string.
* String substr_replace (string str, string replacement, int start [, int length])
* Filling and removing strings
* 1. crop characters starting from strings
* String ltrim (string str [, string charliset])
* 2. crop characters from the end of a string
* String rtrim (string str [, string charliset])
* 3. crop characters from both ends of the string
* String trim (string str [, string charliset])
* 4. fill in strings
* String str_pad (string str, int length [, string pad_string [, int pad_type])
* Character and word count
* 1. string character count
* Mixed count_chars (string str [, mode])
* 2. total number of words in a string
* Mixed str_word_count (string str [, int format])
*/
