21. What is the difference between mysql_fetch_object and mysql_fetch_array?
MySQL fetch object will collect first single matching record where mysql_fetch_array will collect all matching records from the table in an array
22. How can I execute a PHP script using command line?
Just run the PHP CLI (Command Line Interface) program and provide the PHP script file name as the command line argument. For example, “php myScript.php”, assuming “php” is the command to invoke the CLI program.
Be aware that if your PHP script was written for the Web CGI interface, it may not execute properly in command line environment.I am trying to assign a variable the value of 0123, but it keeps coming up with a different number, what’s the problem?
PHP Interpreter treats numbers beginning with 0 as octal. Look at the similar PHP interview questions for more numeric problems.Would I use print “$a dollars” or “{$a} dollars” to print out the amount of dollars in this example?
In this example it wouldn’t matter, since the variable is all by itself, but if you were to print something like “{$a},000,000 mln dollars”, then you definitely need to use the braces.What are the different tables present in MySQL? Which type of table is generated when we are creating a table in the following syntax: create table employee(eno int(2),ename varchar(10))?
Total 5 types of tables we can create
1. MyISAM2. Heap
3. Merge
4. INNO DB
5. ISAM
MyISAM is the default storage engine as of MySQL 3.23. When you fire the above create query
MySQL will create a MyISAM table.
23.How To Create a Table?
If you want to create a table, you can run the CREATE TABLE statement as shown in the
following sample script:
<?php
include “mysql_connection.php”;
$sql = “CREATE TABLE Tech_links (“
. ” id INTEGER NOT NULL”
. “, url VARCHAR(80) NOT NULL”
. “, notes VARCHAR(1024)”
. “, counts INTEGER”
. “, time TIMESTAMP DEFAULT sysdate()”
. “)”;
if (mysql_query($sql, $con)) {
print(“Table Tech_links created.\n”);
} else {
print(“Table creation failed.\n”);
}
mysql_close($con);
?>
Remember that mysql_query() returns TRUE/FALSE on CREATE statements. If you run this
script, you will get something like this:
Table Tech_links created.
24.How can we encrypt the username and password using PHP?
You can encrypt a password with the following Mysql>SET
PASSWORD=PASSWORD(“Password”);
25.What is the functionality of the function strstr and stristr?
strstr() returns part of a given string from the first occurrence of a given substring to the end of the string. For example: strstr(“user@example.com”,”@”) will return “@example.com”.
stristr() is idential to strstr() except that it is case insensitive.What is the difference between ereg_replace() and eregi_replace()?
eregi_replace() function is identical to ereg_replace() except that it ignores case distinction when matching alphabetic characters.
26.How do I find out the number of parameters passed into function9.?
func_num_args() function returns the number of parameters passed in.What is the purpose of the following files having extensions: frm, myd, and myi? What these files contain?
In MySQL, the default table type is MyISAM.
Each MyISAM table is stored on disk in three files. The files have names that begin with the table name and have an extension to indicate the file type.
The ‘.frm’ file stores the table definition.
The data file has a ‘.MYD’ (MYData) extension.
The index file has a ‘.MYI’ (MYIndex) extension,
27.If the variable $a is equal to 5 and variable $b is equal to character a, what’s the value of $$b?
100, it’s a reference to existing variable.
28.How To Protect Special Characters in Query String?
If you want to include special characters like spaces in the query string, you need to protect them by applying the urlencode() translation function. The script below shows how to use urlencode():
<?php
print(“<html>”);
print(“<p>Please click the links below”
.” to submit comments about TECHPreparation.com:</p>”);
$comment = ‘I want to say: “It\’s a good site! :->”‘;
$comment = urlencode($comment);
print(“<p>”
.”<a href=\”processing_forms.php?name=Guest&comment=$comment\”>”
.”It’s an excellent site!</a></p>”);
$comment = ‘This visitor said: “It\’s an average site! “‘;
$comment = urlencode($comment);
print(“<p>”
.’<a href=”processing_forms.php?’.$comment.’”>’
.”It’s an average site.</a></p>”);
print(“</html>”);
?>
29.Are objects passed by value or by reference?
Everything is passed by value.
30.What are the differences between DROP a table and TRUNCATE a table?
DROP TABLE table_name – This will delete the table and its data.
TRUNCATE TABLE table_name – This will delete the data of the table, but not the table definition.
More Questions & Answers :-
Page1 Page2 Page3 Page4 Page5 Page6 Page7 Page8 Page9 Page10
MySQL fetch object will collect first single matching record where mysql_fetch_array will collect all matching records from the table in an array
22. How can I execute a PHP script using command line?
Just run the PHP CLI (Command Line Interface) program and provide the PHP script file name as the command line argument. For example, “php myScript.php”, assuming “php” is the command to invoke the CLI program.
Be aware that if your PHP script was written for the Web CGI interface, it may not execute properly in command line environment.I am trying to assign a variable the value of 0123, but it keeps coming up with a different number, what’s the problem?
PHP Interpreter treats numbers beginning with 0 as octal. Look at the similar PHP interview questions for more numeric problems.Would I use print “$a dollars” or “{$a} dollars” to print out the amount of dollars in this example?
In this example it wouldn’t matter, since the variable is all by itself, but if you were to print something like “{$a},000,000 mln dollars”, then you definitely need to use the braces.What are the different tables present in MySQL? Which type of table is generated when we are creating a table in the following syntax: create table employee(eno int(2),ename varchar(10))?
Total 5 types of tables we can create
1. MyISAM2. Heap
3. Merge
4. INNO DB
5. ISAM
MyISAM is the default storage engine as of MySQL 3.23. When you fire the above create query
MySQL will create a MyISAM table.
23.How To Create a Table?
If you want to create a table, you can run the CREATE TABLE statement as shown in the
following sample script:
<?php
include “mysql_connection.php”;
$sql = “CREATE TABLE Tech_links (“
. ” id INTEGER NOT NULL”
. “, url VARCHAR(80) NOT NULL”
. “, notes VARCHAR(1024)”
. “, counts INTEGER”
. “, time TIMESTAMP DEFAULT sysdate()”
. “)”;
if (mysql_query($sql, $con)) {
print(“Table Tech_links created.\n”);
} else {
print(“Table creation failed.\n”);
}
mysql_close($con);
?>
Remember that mysql_query() returns TRUE/FALSE on CREATE statements. If you run this
script, you will get something like this:
Table Tech_links created.
24.How can we encrypt the username and password using PHP?
You can encrypt a password with the following Mysql>SET
PASSWORD=PASSWORD(“Password”);
25.What is the functionality of the function strstr and stristr?
strstr() returns part of a given string from the first occurrence of a given substring to the end of the string. For example: strstr(“user@example.com”,”@”) will return “@example.com”.
stristr() is idential to strstr() except that it is case insensitive.What is the difference between ereg_replace() and eregi_replace()?
eregi_replace() function is identical to ereg_replace() except that it ignores case distinction when matching alphabetic characters.
26.How do I find out the number of parameters passed into function9.?
func_num_args() function returns the number of parameters passed in.What is the purpose of the following files having extensions: frm, myd, and myi? What these files contain?
In MySQL, the default table type is MyISAM.
Each MyISAM table is stored on disk in three files. The files have names that begin with the table name and have an extension to indicate the file type.
The ‘.frm’ file stores the table definition.
The data file has a ‘.MYD’ (MYData) extension.
The index file has a ‘.MYI’ (MYIndex) extension,
27.If the variable $a is equal to 5 and variable $b is equal to character a, what’s the value of $$b?
100, it’s a reference to existing variable.
28.How To Protect Special Characters in Query String?
If you want to include special characters like spaces in the query string, you need to protect them by applying the urlencode() translation function. The script below shows how to use urlencode():
<?php
print(“<html>”);
print(“<p>Please click the links below”
.” to submit comments about TECHPreparation.com:</p>”);
$comment = ‘I want to say: “It\’s a good site! :->”‘;
$comment = urlencode($comment);
print(“<p>”
.”<a href=\”processing_forms.php?name=Guest&comment=$comment\”>”
.”It’s an excellent site!</a></p>”);
$comment = ‘This visitor said: “It\’s an average site! “‘;
$comment = urlencode($comment);
print(“<p>”
.’<a href=”processing_forms.php?’.$comment.’”>’
.”It’s an average site.</a></p>”);
print(“</html>”);
?>
29.Are objects passed by value or by reference?
Everything is passed by value.
30.What are the differences between DROP a table and TRUNCATE a table?
DROP TABLE table_name – This will delete the table and its data.
TRUNCATE TABLE table_name – This will delete the data of the table, but not the table definition.
More Questions & Answers :-
Page1 Page2 Page3 Page4 Page5 Page6 Page7 Page8 Page9 Page10
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