Tricky Programming things in PHP

Tricky Programming things in PHP:-

1.How to send Email ?
2.How to use explode function in php?
3.How to use implode function in php?
4.What is use of end() function in php?
5.Remove all images path in php.
6.How to remove extension of image file?
7.After click on checkbox more than on checkbox will be appear or dis appear.
8.Difference between My SQL injection and PDO.
9.Why message goes into spam?
10.How to get State name and City name after selecting Country name?
11.How to remove image name prefix or post fix in  existed image path?
12.Perform CRUD Operation in PDO.
13.Use of Header function in php.
14.How to pass id in Anchor tag in php?
15.How to change hover colour in php?
16.How to send mail with google authentication in php?
17.How to send mail without google authentication in php?
18.Click on link image will be display.
19.How to get backup from c panel?
20.How to change c panel password?
21.How to get c panel backup?
22.How to perform validation on email?
23.How to perform validation on name?
24.How to perform validation on name restricted entry?
25.how to perform validation on number ?
26.How to perform validation on number restricted entry(user can't able to enter character in particular input field)?
27.Validation on checkbox.
28.validation on radio button.
29.Click on check box Text box will be appear.
30.Click on radio button Div will be appear.
31.Click on checkbox ,Text box will be appear and entering amount automatically calculated
     (auto addition and subtraction will be perform).
32.After clicking on button  pop up window will be open.
33.How to perform free live chat operation in php ?
34.How to Re write the URL in php?
35.How to connect more than one user in live chat?
36.How to solve special symbols problem like hyphen(-),double quotes ("") ,next/previous problems not visible clearly?