tailieunhanh - PHP Developer's Dictionary- P18

PHP Developer's Dictionary- P18:PHP is an open source, server-side, HTML-embedded scripting language used to create dynamically generated Web pages. With an easy-to-use syntax and a large, extensible library of modules, PHP brings together the best of Perl, C++, and other languages. | PHP Developer s Dictionary string variable2 variable2 variable variablel variablel Description The operator will assign variable to the num or string on the right side of the operand. The second syntactical definition shows how a variable can be assigned the same value as another variable a copy is made. The final definition shows the assignment of variabie2 to variablel as a reference which means that if variable2 changes so does variablel . first 5 second first second 5 now Syntax numl num2 Description The operator is used when you want to add numl to num2 and assign the new value to numl . These values are numerical. num 5 num 3 num now equals 8 Syntax numl - num2 Description IT-SC book 85 PHP Developer s Dictionary The - operator is used when you want to subtract num2 from numi and assign the new value to numi . These values are numerical. Syntax numl num2 Description The operator is used when you want to multiply numl by num2 and assign the new value to numl . These values are numerical. num 5 num 3 num now equals 15 Syntax numl num2 Description The operator is used when you want to divide numl by num2 and assign the new value to numl . These values are numerical. Syntax numl num2 Description The operator is used to obtain the integer remainder of dividing numi by num2 and assign the new value to numi . For instance if numi 5 and num2 3 the integer returned from this operation will be 2 and it would be stored in numi . These values are numerical. IT-SC book 86 PHP Developer s Dictionary Bitwise Bitwise operators are one of the most difficult operations to understand for new programmers. In short they convert the items into their binary equivalents such as and and or for operations that they are to perform. Note Going into detail on the overall concept of bitwise operations is beyond this scope of this book but the descriptions and examples contained in this section should provide enough information to enable you to perform any bitwise tasks you need. and .

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