PHP Common string disposition function

PHP Common string processing functions

PHP String Operations Common functions

/*

* Determine string length

* int strlen (string str)

* Comparison of two strings

* 1, strcmp function on two string binary security comparison, and case-sensitive

* int strcmp (string str1,string str2)

* 2. Compare two strings in a case-insensitive manner

* int strcasecmp (string str1,string str2)

* 3, two strings of the same part

* int strspn (string str1,string str2)

* 4, ask for two different parts of a string

* int strcspn (string str1,string str2)

* Handle string case

* 1. Convert all strings to lowercase

* String Strtolower (String str)

* 2. Convert all strings to uppercase

* String Strtoupper (String str)

* 3. Capitalize the first character of the string

* String Ucfirst (String str)

* 4. Turn each word in the string into uppercase

* String Ucword (String str)

* Strings and HTML are converted to each other

* 1. Convert newline characters to HTML termination tags

* String bl2br (String str)

* 2, the special character conversion 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])

* Alternative functions for regular expression functions

* 1. The Strtok function parses a string based on a list of predefined strings

* String Strtok (string str,string tonens)

* 2. Parse string according to predefined delimiter

* Array Explode (string separator,string str[,int limit])

* 3. Convert an array to a string

* String implode (string delimiter, array array)

* 4. Parsing 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 a string with another string

* Mixed Str_replace (string occurrence,mixed replacement,mixed str[,int count])

* 7. Get part of a string strstr returns the remainder of the first occurrence of a predefined string in a string

* String Strstr (string str,string occurrence)

* 8. Returns part of a string according to a predefined offset

* String substr (string str,int start[,ing length])

* 9, determine the frequency of the occurrence of the string

* int Substr_count (string str,string substring)

* 10. Replace part of a string with another string

* String Substr_replace (string str,string replacement,int start[,int length])

* Fill and reject strings

* 1. Start clipping character from string

* 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, padding string

* String Str_pad (string Str,int length[,string pad_string[,int Pad_type])

* Character and Word count

* 1, character count in string

* Mixed Count_chars (string Str[,mode])

* 2, the total number of words in the string count

* Mixed Str_word_count (string str[,int format])

*/

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