PHP Coding Specification (_php) tutorial

6.5 for statement

A For statement should have the following format:

for (initialization; condition; update) {
statements;
}

An empty for statement (all work done in initialization, conditional judgment, and UPDATE clauses) should have the following format:

for (initialization; condition; update);

When using commas in the initialization or update clauses of a for statement, avoid using more than three variables, which results in a higher degree of complexity. If required, separate statements can be used before the For loop (for an initialization clause) or for the end of a for loop (for an update clause).

6.6 While statement

A while statement should have the following format
while (condition) {
statements;
}

An empty while statement should have the following format:
while (condition);
6.7 do...while Statements

A do-while statement should have the following format:

do {
statements;
} while (condition);

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