Organize and summarize some commonly used functions in PHP strings (collection)

This article has compiled some common functions in PHP strings. Come and collect them. I hope it will be helpful to you!

String length

• strlen(string) function returns the length of the string.

• mb_strlen() can effectively solve the problem of Chinese string byte count

String position

• strrpos() function finds the last occurrence of a string in another string

• strtipos() function finds the last occurrence of a string in another string The position of the last occurrence of a string in another string (not case sensitive)

• strpos() function finds the position of the first occurrence of a string in another string

• stripos() function finds the first occurrence of a string in another string (not case sensitive)

String interception

• substr() function to intercept strings

• mb_substr() function to intercept strings containing Chinese

String splitting

#The output is an array

• ##explode(separator,string,limit) splits the string

• split(pattern,string,limit) split string

##String comparison

strcmp() function compares two strings #case sensitive
strcasecmp() compares two strings #not case sensitive
The strnatcmp() function uses a "natural" algorithm to compare two strings
strncmp() is binary safe and case-sensitive.

String ASCII

chr() function returns the character from the specified ASCII value.
#ord() function returns the ASCII value of the first character of a string.

String MD5 operation

md5() function calculates the MD5 hash of a string.
The md5() function uses RSA data security, including the MD5 message digest algorithm.

String output

echo()
print( )#Output one or more strings, the return value is always 1
print_r()
var_dump()#Display one or more Structural information of an expression, including the type and value of the expression

The string is trimmed with spaces

trim( ) function to delete the spaces at both ends of the string
ltrim() function to delete the spaces on the left side of the string
rtrim() function to delete the spaces on the right side of the string

String replacement

##strstr() function#Case sensitive

• str_replace() function#case-sensitive

• sunst_replace() function#case-sensitive

• Recommended study:《
PHP video tutorial

》

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