stripcslashes clear a string form and /

echo strrpos("Hello world!","wo");   // 6

echo str_replace("world","Peter","Hello world!");  // Hello Peter!



echo strcmp("Hello world!","Hello world!"); // 0

0 - if the two strings are equal

<0 - if string1 is less than string2

>0 - if string1 is greater than string2



stripos(string,find,start)



stripos("Hello world!","WO"); // 6



stristr("Hello worldabc…","WORLD"); // worldabc…



strlen("Hello world!"); // 12



substr(string,start,length) 



string	Required. Specifies the string to return a part of

start	Required. Specifies where to start in the string 

+ A positive number - Start at a specified position in the string

+ A negative number - Start at a specified position from the end of the string

+ 0 - Start at the first character in string length	

Optional. Specifies the length of the returned string. 

Default is to the end of the string. 

+ A positive number - The length to be returned from the start parameter

+ Negative number - The length to be returned from the end of the string



echo substr("Hello world!",6); // world!



echo substr("Hello world!",6,5); // world

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Specifies the string to return a part of start Required. Specifies where to start in the string + A positive number - Start at a specified position in the string + A negative number - Start at a specified position from the end of the string + 0 - Start at the first character in string length Optional. Specifies the length of the returned string. 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stripcslashes clear a string form and /