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PHP - Loop Types
Loops in PHP are used to execute the same block of code a specified number of times. PHP supports following four loop types.
• for − loops through a block of code a specified number of times.
• while − loops through a block of code if and as long as a specified condition is true.
• do...while − loops through a block of code once, and then repeats the loop as long as a special condition is true.
• foreach − loops through a block of code for each element in an array.
We will discuss about continue and break keywords used to control the loops execution.
The for loop statement
HERE,
• “for…{…}” is the loop block
• “initialize” usually an integer; it is used to set the counter’s initial value.
• “condition” the condition that is evaluated for each php execution. If it evaluates to true then execution of the for... loop is terminated. If it evaluates to false, the execution of the for... loop continues.
• “increment” is used to increment the initial value of counter integer

The for statement is used when you know how many times you want to execute a statement or a block of statements.

Syntax
for (initialization; condition; increment){
code to be executed;
}
The initializer is used to set the start value for the counter of the number of loop iterations. A variable may be declared here for this purpose and it is traditional to name it $i.
Example
The following example makes five iterations and changes the assigned value of two variables on each pass of the loop −
For Each loop
The php foreach loop is used to iterate through array values. It has the following basic syntax
?php
foreach($array_variable as $array_values){

block of code to be executed

}

HERE,
• “foreach(…){…}” is the foreach php loop block code
• “$array_data” is the array variable to be looped through
• “$array_value “ is the temporary variable that holds the current array item values.
• “block of code…” is the piece of code that operates on the array values
How it works The flowchart shown below illustrates how the for… each… loop works

Practical examples
The code below uses for… each loop to read and print the elements of an array.