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If you want to check a length of the string in php, just user strlen() function. It will return the given string length. See example: if ( strlen( $unknownString ) > 10 ) { echo "String has more than 10 characters"; }

If you want to check if one string contains desired string, you can use strpos function. But be aware - the problem rises when a needle is on position 0 of checked string. In that situation php strpos() returns 0, and it will return false if string is not found. So, to compare if a string is containing user string, use !== operator if ( strpos( $string , 'somestring' ) !== false ) { } Also use === false if you want to check that string doesn't not contains data

Use explode function for this job: $names = 'John,Margaret,Thomas'; $namesArray = explode( ',' , $names ); echo $namesArray[0]; echo $namesArray[1]; echo $namesArray[2]; You can also use a character sequence to split string like a "splitplace"

To convert string to int in PHP you can use casting or intval() function. See example: $intVariable = intval( $unknownVariable ); // or: $intVariable = (int)$unknownVariable; You can cast with this function every php variable, like double. Remember that php can throw a error or warning, especially if variable is not set