泄漏數據或調試信息將會幫助攻擊者了解系統和制定攻擊計劃。
如果啟用 display_errors 選項，Web 中會顯示發生的錯誤，這些錯誤會向攻擊者明示系統的薄弱之處。例如，一個數據庫錯誤消息可以揭示應用程序容易受到 SQL Injection 攻擊。其他的錯誤消息可以揭示有關該系統的更多間接線索。
[1] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A10 Insecure Configuration Management
[2] Standards Mapping - OWASP Top 10 2007 - (OWASP 2007) A6 Information Leakage and Improper Error Handling
[3] Standards Mapping - OWASP Top 10 2010 - (OWASP 2010) A6 Security Misconfiguration
[4] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP3120 CAT II
[5] Standards Mapping - Security Technical Implementation Guide Version 3.4 - (STIG 3.4) APP3120 CAT II
[6] Standards Mapping - FIPS200 - (FISMA) CM
[7] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 209, CWE ID 215
[8] Standards Mapping - Web Application Security Consortium 24 + 2 - (WASC 24 + 2) Information Leakage
[9] Standards Mapping - SANS Top 25 2009 - (SANS 2009) Insecure Interaction - CWE ID 209
[10] Standards Mapping - SANS Top 25 2010 - (SANS 2010) Insecure Interaction - CWE ID 209
[11] M. Achour et al. PHP Manual
[12] PHP Security Consortium PhpSecInfo Test Information
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.10
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 - (PCI 2.0) Requirement 6.5.5
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 - (PCI 1.2) Requirement 6.5.6